913609931 has 4 divisors (see below), whose sum is σ = 983887632. Its totient is φ = 843332232.

The previous prime is 913609913. The next prime is 913609999. The reversal of 913609931 is 139906319.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 913609931 - 2¹⁴ = 913593547 is a prime.

It is a super-2 number, since 2×913609931² = 1669366212043649522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (913609901) 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, 35138831 + ... + 35138856.

It is an arithmetic number, because the mean of its divisors is an integer number (245971908).

Almost surely, 2^913609931 is an apocalyptic number.

913609931 is a deficient number, since it is larger than the sum of its proper divisors (70277701).

913609931 is a wasteful number, since it uses less digits than its factorization.

913609931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70277700.

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 913609931 is about 30225.9810593469. The cubic root of 913609931 is about 970.3318137143.

The spelling of 913609931 in words is "nine hundred thirteen million, six hundred nine thousand, nine hundred thirty-one".