90990995 has 4 divisors (see below), whose sum is σ = 109189200. Its totient is φ = 72792792.

The previous prime is 90990937. The next prime is 90990997. The reversal of 90990995 is 59909909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59909909 = 2081 ⋅28789.

It is a cyclic number.

It is not a de Polignac number, because 90990995 - 2¹⁸ = 90728851 is a prime.

It is a super-2 number, since 2×90990995² = 16558722342180050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90990997) 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, 9099095 + ... + 9099104.

It is an arithmetic number, because the mean of its divisors is an integer number (27297300).

Almost surely, 2^90990995 is an apocalyptic number.

90990995 is a deficient number, since it is larger than the sum of its proper divisors (18198205).

90990995 is a wasteful number, since it uses less digits than its factorization.

90990995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18198204.

The product of its (nonzero) digits is 295245, while the sum is 50.

The square root of 90990995 is about 9538.9200122446. The cubic root of 90990995 is about 449.7793074217.

The spelling of 90990995 in words is "ninety million, nine hundred ninety thousand, nine hundred ninety-five".