90890961 has 16 divisors (see below), whose sum is σ = 139020288. Its totient is φ = 51742800.

The previous prime is 90890957. The next prime is 90891023. The reversal of 90890961 is 16909809.

It is not a de Polignac number, because 90890961 - 2² = 90890957 is a prime.

It is a super-2 number, since 2×90890961² = 16522333583007042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90890951) 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, 2295 + ... + 13676.

It is an arithmetic number, because the mean of its divisors is an integer number (8688768).

Almost surely, 2^90890961 is an apocalyptic number.

It is an amenable number.

90890961 is a deficient number, since it is larger than the sum of its proper divisors (48129327).

90890961 is a wasteful number, since it uses less digits than its factorization.

90890961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16252.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 90890961 is about 9533.6751045963. The cubic root of 90890961 is about 449.6144203301.

The spelling of 90890961 in words is "ninety million, eight hundred ninety thousand, nine hundred sixty-one".