979375261 has 4 divisors (see below), whose sum is σ = 979437852. Its totient is φ = 979312672.

The previous prime is 979375249. The next prime is 979375289. The reversal of 979375261 is 162573979.

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: 162573979 = 41 ⋅3965219.

It can be written as a sum of positive squares in 2 ways, for example, as 800324100 + 179051161 = 28290^2 + 13381^2 .

It is a cyclic number.

It is not a de Polignac number, because 979375261 - 2²¹ = 977278109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979375861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15585 + ... + 46921.

It is an arithmetic number, because the mean of its divisors is an integer number (244859463).

Almost surely, 2^979375261 is an apocalyptic number.

It is an amenable number.

979375261 is a deficient number, since it is larger than the sum of its proper divisors (62591).

979375261 is a wasteful number, since it uses less digits than its factorization.

979375261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62590.

The product of its digits is 714420, while the sum is 49.

The square root of 979375261 is about 31294.9718165714. The cubic root of 979375261 is about 993.0772734456.

The spelling of 979375261 in words is "nine hundred seventy-nine million, three hundred seventy-five thousand, two hundred sixty-one".