90320051 has 4 divisors (see below), whose sum is σ = 90390672. Its totient is φ = 90249432.

The previous prime is 90320047. The next prime is 90320063. The reversal of 90320051 is 15002309.

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 90320051 - 2² = 90320047 is a prime.

It is a super-2 number, since 2×90320051² = 16315423225285202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90320551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33356 + ... + 35961.

It is an arithmetic number, because the mean of its divisors is an integer number (22597668).

Almost surely, 2^90320051 is an apocalyptic number.

90320051 is a deficient number, since it is larger than the sum of its proper divisors (70621).

90320051 is a wasteful number, since it uses less digits than its factorization.

90320051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70620.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 90320051 is about 9503.6861795832. The cubic root of 90320051 is about 448.6710603096.

The spelling of 90320051 in words is "ninety million, three hundred twenty thousand, fifty-one".