296831561 has 8 divisors (see below), whose sum is σ = 320759880. Its totient is φ = 273059712.

The previous prime is 296831533. The next prime is 296831569. The reversal of 296831561 is 165138692.

It can be written as a sum of positive squares in 4 ways, for example, as 121110025 + 175721536 = 11005^2 + 13256^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-296831561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (296831569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35156 + ... + 42773.

It is an arithmetic number, because the mean of its divisors is an integer number (40094985).

Almost surely, 2^296831561 is an apocalyptic number.

It is an amenable number.

296831561 is a deficient number, since it is larger than the sum of its proper divisors (23928319).

296831561 is a wasteful number, since it uses less digits than its factorization.

296831561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78235.

The product of its digits is 77760, while the sum is 41.

The square root of 296831561 is about 17228.8003354848. The cubic root of 296831561 is about 667.0678736954.

The spelling of 296831561 in words is "two hundred ninety-six million, eight hundred thirty-one thousand, five hundred sixty-one".