90695631 has 8 divisors (see below), whose sum is σ = 130229680. Its totient is φ = 55812672.

The previous prime is 90695599. The next prime is 90695639. The reversal of 90695631 is 13659609.

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

It is not a de Polignac number, because 90695631 - 2⁵ = 90695599 is a prime.

It is a super-2 number, since 2×90695631² = 16451394964976322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 2325529 = 90695631 / (9 + 0 + 6 + 9 + 5 + 6 + 3 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90695631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90695639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1162726 + ... + 1162803.

It is an arithmetic number, because the mean of its divisors is an integer number (16278710).

Almost surely, 2^90695631 is an apocalyptic number.

90695631 is a deficient number, since it is larger than the sum of its proper divisors (39534049).

90695631 is a wasteful number, since it uses less digits than its factorization.

90695631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325545.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 90695631 is about 9523.4253816576. The cubic root of 90695631 is about 449.2921067529.

The spelling of 90695631 in words is "ninety million, six hundred ninety-five thousand, six hundred thirty-one".