961847531 has 4 divisors (see below), whose sum is σ = 961935864. Its totient is φ = 961759200.

The previous prime is 961847479. The next prime is 961847561. The reversal of 961847531 is 135748169.

961847531 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: 135748169 = 197 ⋅689077.

It is a cyclic number.

It is not a de Polignac number, because 961847531 - 2¹⁰ = 961846507 is a prime.

It is a super-2 number, since 2×961847531² = 1850301345781591922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961847561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25085 + ... + 50526.

It is an arithmetic number, because the mean of its divisors is an integer number (240483966).

Almost surely, 2^961847531 is an apocalyptic number.

961847531 is a deficient number, since it is larger than the sum of its proper divisors (88333).

961847531 is a wasteful number, since it uses less digits than its factorization.

961847531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88332.

The product of its digits is 181440, while the sum is 44.

The square root of 961847531 is about 31013.6668422165. Note that the first 3 decimals coincide. The cubic root of 961847531 is about 987.1172579865.

The spelling of 961847531 in words is "nine hundred sixty-one million, eight hundred forty-seven thousand, five hundred thirty-one".