90575091 has 24 divisors (see below), whose sum is σ = 140365680. Its totient is φ = 58296672.

The previous prime is 90575059. The next prime is 90575113. The reversal of 90575091 is 19057509.

It is a happy number.

It is not a de Polignac number, because 90575091 - 2⁵ = 90575059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90575021) 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 23 ways as a sum of consecutive naturals, for example, 621 + ... + 13473.

It is an arithmetic number, because the mean of its divisors is an integer number (5848570).

Almost surely, 2^90575091 is an apocalyptic number.

90575091 is a deficient number, since it is larger than the sum of its proper divisors (49790589).

90575091 is a wasteful number, since it uses less digits than its factorization.

90575091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12897 (or 12885 counting only the distinct ones).

The product of its (nonzero) digits is 14175, while the sum is 36.

The square root of 90575091 is about 9517.0946722201. The cubic root of 90575091 is about 449.0929730106.

The spelling of 90575091 in words is "ninety million, five hundred seventy-five thousand, ninety-one".