90497031 has 4 divisors (see below), whose sum is σ = 120662712. Its totient is φ = 60331352.

The previous prime is 90497003. The next prime is 90497039. The reversal of 90497031 is 13079409.

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 90497031 - 2⁵ = 90496999 is a prime.

It is a super-2 number, since 2×90497031² = 16379425239629922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90496983 and 90497001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90497039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15082836 + ... + 15082841.

It is an arithmetic number, because the mean of its divisors is an integer number (30165678).

Almost surely, 2^90497031 is an apocalyptic number.

90497031 is a deficient number, since it is larger than the sum of its proper divisors (30165681).

90497031 is a wasteful number, since it uses less digits than its factorization.

90497031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30165680.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 90497031 is about 9512.9927467648. The cubic root of 90497031 is about 448.9639225447.

The spelling of 90497031 in words is "ninety million, four hundred ninety-seven thousand, thirty-one".