90875899 has 4 divisors (see below), whose sum is σ = 92989336. Its totient is φ = 88762464.

The previous prime is 90875891. The next prime is 90875927. The reversal of 90875899 is 99857809.

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 90875899 - 2³ = 90875891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90875891) 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, 1056654 + ... + 1056739.

It is an arithmetic number, because the mean of its divisors is an integer number (23247334).

Almost surely, 2^90875899 is an apocalyptic number.

90875899 is a deficient number, since it is larger than the sum of its proper divisors (2113437).

90875899 is a wasteful number, since it uses less digits than its factorization.

90875899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113436.

The product of its (nonzero) digits is 1632960, while the sum is 55.

The square root of 90875899 is about 9532.8851351519. The cubic root of 90875899 is about 449.5895829996.

The spelling of 90875899 in words is "ninety million, eight hundred seventy-five thousand, eight hundred ninety-nine".