90657149 has 4 divisors (see below), whose sum is σ = 98898720. Its totient is φ = 82415580.

The previous prime is 90657143. The next prime is 90657157. The reversal of 90657149 is 94175609.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90657149 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 (90657143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4120769 + ... + 4120790.

It is an arithmetic number, because the mean of its divisors is an integer number (24724680).

Almost surely, 2^90657149 is an apocalyptic number.

It is an amenable number.

90657149 is a deficient number, since it is larger than the sum of its proper divisors (8241571).

90657149 is a wasteful number, since it uses less digits than its factorization.

90657149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8241570.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 90657149 is about 9521.4047808083. The cubic root of 90657149 is about 449.2285531412.

The spelling of 90657149 in words is "ninety million, six hundred fifty-seven thousand, one hundred forty-nine".