90651911 has 12 divisors (see below), whose sum is σ = 106900992. Its totient is φ = 76634208.

The previous prime is 90651839. The next prime is 90651919. The reversal of 90651911 is 11915609.

It is a happy number.

It is not a de Polignac number, because 90651911 - 2²² = 86457607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90651919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9095 + ... + 16248.

It is an arithmetic number, because the mean of its divisors is an integer number (8908416).

Almost surely, 2^90651911 is an apocalyptic number.

90651911 is a deficient number, since it is larger than the sum of its proper divisors (16249081).

90651911 is a wasteful number, since it uses less digits than its factorization.

90651911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25430 (or 25423 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 90651911 is about 9521.1297123818. The cubic root of 90651911 is about 449.2199011135.

The spelling of 90651911 in words is "ninety million, six hundred fifty-one thousand, nine hundred eleven".