90603631 has 4 divisors (see below), whose sum is σ = 91955992. Its totient is φ = 89251272.

The previous prime is 90603619. The next prime is 90603677. The reversal of 90603631 is 13630609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13630609 = 29 ⋅470021.

It is a cyclic number.

It is not a de Polignac number, because 90603631 - 2⁷ = 90603503 is a prime.

It is a super-2 number, since 2×90603631² = 16418035900768322, which contains 22 as substring.

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 90603631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90603031) 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, 676080 + ... + 676213.

It is an arithmetic number, because the mean of its divisors is an integer number (22988998).

Almost surely, 2^90603631 is an apocalyptic number.

90603631 is a deficient number, since it is larger than the sum of its proper divisors (1352361).

90603631 is a wasteful number, since it uses less digits than its factorization.

90603631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352360.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 90603631 is about 9518.5939612949. The cubic root of 90603631 is about 449.1401374401.

The spelling of 90603631 in words is "ninety million, six hundred three thousand, six hundred thirty-one".