90001995 has 16 divisors (see below), whose sum is σ = 152474400. Its totient is φ = 45177344.

The previous prime is 90001991. The next prime is 90001997. The reversal of 90001995 is 59910009.

It is a cyclic number.

It is not a de Polignac number, because 90001995 - 2² = 90001991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90001991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176220 + ... + 176729.

It is an arithmetic number, because the mean of its divisors is an integer number (9529650).

Almost surely, 2^90001995 is an apocalyptic number.

90001995 is a deficient number, since it is larger than the sum of its proper divisors (62472405).

90001995 is a wasteful number, since it uses less digits than its factorization.

90001995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352974.

The product of its (nonzero) digits is 3645, while the sum is 33.

The square root of 90001995 is about 9486.9381256547. The cubic root of 90001995 is about 448.1437858914.

The spelling of 90001995 in words is "ninety million, one thousand, nine hundred ninety-five".