91354568 has 16 divisors (see below), whose sum is σ = 171394380. Its totient is φ = 45649408.

The previous prime is 91354559. The next prime is 91354577. The reversal of 91354568 is 86545319.

It is an interprime number because it is at equal distance from previous prime (91354559) and next prime (91354577).

It can be written as a sum of positive squares in 2 ways, for example, as 68525284 + 22829284 = 8278^2 + 4778^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18896 + ... + 23232.

Almost surely, 2^91354568 is an apocalyptic number.

It is an amenable number.

91354568 is a deficient number, since it is larger than the sum of its proper divisors (80039812).

91354568 is a wasteful number, since it uses less digits than its factorization.

91354568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6976 (or 6972 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 91354568 is about 9557.9583593987. The cubic root of 91354568 is about 450.3775728206.

Subtracting from 91354568 its reverse (86545319), we obtain a square (4809249 = 2193²).

It can be divided in two parts, 9135 and 4568, that multiplied together give a triangular number (41728680 = T₉₁₃₅).

The spelling of 91354568 in words is "ninety-one million, three hundred fifty-four thousand, five hundred sixty-eight".