90938657 has 4 divisors (see below), whose sum is σ = 91274496. Its totient is φ = 90602820.

The previous prime is 90938651. The next prime is 90938669. The reversal of 90938657 is 75683909.

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 not a de Polignac number, because 90938657 - 2⁴ = 90938641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90938651) 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, 167513 + ... + 168054.

It is an arithmetic number, because the mean of its divisors is an integer number (22818624).

Almost surely, 2^90938657 is an apocalyptic number.

It is an amenable number.

90938657 is a deficient number, since it is larger than the sum of its proper divisors (335839).

90938657 is a wasteful number, since it uses less digits than its factorization.

90938657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335838.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 90938657 is about 9536.1762253012. The cubic root of 90938657 is about 449.6930532294.

The spelling of 90938657 in words is "ninety million, nine hundred thirty-eight thousand, six hundred fifty-seven".