90207431 has 8 divisors (see below), whose sum is σ = 92534400. Its totient is φ = 87903712.

The previous prime is 90207409. The next prime is 90207433. The reversal of 90207431 is 13470209.

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 90207431 - 2⁶ = 90207367 is a prime.

It is a super-2 number, since 2×90207431² = 16274761215239522, 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 90207431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90207433) 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 7 ways as a sum of consecutive naturals, for example, 2186 + ... + 13608.

It is an arithmetic number, because the mean of its divisors is an integer number (11566800).

Almost surely, 2^90207431 is an apocalyptic number.

90207431 is a deficient number, since it is larger than the sum of its proper divisors (2326969).

90207431 is a wasteful number, since it uses less digits than its factorization.

90207431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11625.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 90207431 is about 9497.7592620576. The cubic root of 90207431 is about 448.4845002177.

The spelling of 90207431 in words is "ninety million, two hundred seven thousand, four hundred thirty-one".