90975957 has 4 divisors (see below), whose sum is σ = 121301280. Its totient is φ = 60650636.

The previous prime is 90975947. The next prime is 90975967. The reversal of 90975957 is 75957909.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (90975947) and next prime (90975967).

It is a cyclic number.

It is not a de Polignac number, because 90975957 - 2⁶ = 90975893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90975947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15162657 + ... + 15162662.

It is an arithmetic number, because the mean of its divisors is an integer number (30325320).

Almost surely, 2^90975957 is an apocalyptic number.

It is an amenable number.

90975957 is a deficient number, since it is larger than the sum of its proper divisors (30325323).

90975957 is a wasteful number, since it uses less digits than its factorization.

90975957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30325322.

The product of its (nonzero) digits is 893025, while the sum is 51.

The square root of 90975957 is about 9538.1317353033. The cubic root of 90975957 is about 449.7545278492.

The spelling of 90975957 in words is "ninety million, nine hundred seventy-five thousand, nine hundred fifty-seven".