91659856 has 10 divisors (see below), whose sum is σ = 177591002. Its totient is φ = 45829920.

The previous prime is 91659847. The next prime is 91659941. The reversal of 91659856 is 65895619.

It can be written as a sum of positive squares in only one way, i.e., 91393600 + 266256 = 9560^2 + 516^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2864355 + ... + 2864386.

Almost surely, 2^91659856 is an apocalyptic number.

It is an amenable number.

91659856 is a deficient number, since it is larger than the sum of its proper divisors (85931146).

91659856 is a wasteful number, since it uses less digits than its factorization.

91659856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5728749 (or 5728743 counting only the distinct ones).

The product of its digits is 583200, while the sum is 49.

The square root of 91659856 is about 9573.9153954900. The cubic root of 91659856 is about 450.8787044568.

The spelling of 91659856 in words is "ninety-one million, six hundred fifty-nine thousand, eight hundred fifty-six".