90572387 has 4 divisors (see below), whose sum is σ = 90829320. Its totient is φ = 90315456.

The previous prime is 90572381. The next prime is 90572401. The reversal of 90572387 is 78327509.

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 90572387 - 2⁴ = 90572371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90572381) 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, 127937 + ... + 128642.

It is an arithmetic number, because the mean of its divisors is an integer number (22707330).

Almost surely, 2^90572387 is an apocalyptic number.

90572387 is a deficient number, since it is larger than the sum of its proper divisors (256933).

90572387 is a wasteful number, since it uses less digits than its factorization.

90572387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256932.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 90572387 is about 9516.9526109990. The cubic root of 90572387 is about 449.0885039398.

The spelling of 90572387 in words is "ninety million, five hundred seventy-two thousand, three hundred eighty-seven".