9279661561 has 3 divisors (see below), whose sum is σ = 9279757893. Its totient is φ = 9279565230.

The previous prime is 9279661549. The next prime is 9279661571. The reversal of 9279661561 is 1651669729.

The square root of 9279661561 is 96331.

It is a perfect power (a square), and thus also a powerful number.

9279661561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1651669729 = 67 ⋅24651787.

It is not a de Polignac number, because 9279661561 - 2¹¹ = 9279659513 is a prime.

It is a super-2 number, since 2×9279661561² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9279661499 and 9279661508.

It is not an unprimeable number, because it can be changed into a prime (9279661571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 48166 + ... + 144496.

It is an arithmetic number, because the mean of its divisors is an integer number (3093252631).

Almost surely, 2^9279661561 is an apocalyptic number.

9279661561 is the 96331-st square number.

9279661561 is the 48166-th centered octagonal number.

It is an amenable number.

9279661561 is a deficient number, since it is larger than the sum of its proper divisors (96332).

9279661561 is an frugal number, since it uses more digits than its factorization.

9279661561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192662 (or 96331 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 52.

The cubic root of 9279661561 is about 2101.4096024362.

The spelling of 9279661561 in words is "nine billion, two hundred seventy-nine million, six hundred sixty-one thousand, five hundred sixty-one".