9915631 has 8 divisors (see below), whose sum is σ = 10929744. Its totient is φ = 8920320.

The previous prime is 9915623. The next prime is 9915673. The reversal of 9915631 is 1365199.

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

It is a cyclic number.

It is not a de Polignac number, because 9915631 - 2³ = 9915623 is a prime.

It is a super-2 number, since 2×9915631² = 196639476256322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9915331) 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, 3580 + ... + 5713.

It is an arithmetic number, because the mean of its divisors is an integer number (1366218).

Almost surely, 2^9915631 is an apocalyptic number.

9915631 is a deficient number, since it is larger than the sum of its proper divisors (1014113).

9915631 is a wasteful number, since it uses less digits than its factorization.

9915631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9401.

The product of its digits is 7290, while the sum is 34.

The square root of 9915631 is about 3148.9094937772. The cubic root of 9915631 is about 214.8358653543.

The spelling of 9915631 in words is "nine million, nine hundred fifteen thousand, six hundred thirty-one".