90365961 has 32 divisors (see below), whose sum is σ = 143392768. Its totient is φ = 49533120.

The previous prime is 90365909. The next prime is 90365963. The reversal of 90365961 is 16956309.

It is not a de Polignac number, because 90365961 - 2⁹ = 90365449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90365963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82131 + ... + 83223.

It is an arithmetic number, because the mean of its divisors is an integer number (4481024).

Almost surely, 2^90365961 is an apocalyptic number.

It is an amenable number.

90365961 is a deficient number, since it is larger than the sum of its proper divisors (53026807).

90365961 is a wasteful number, since it uses less digits than its factorization.

90365961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 90365961 is about 9506.1012513017. The cubic root of 90365961 is about 448.7470677927.

The spelling of 90365961 in words is "ninety million, three hundred sixty-five thousand, nine hundred sixty-one".