91908534 has 16 divisors (see below), whose sum is σ = 184015872. Its totient is φ = 30603048.

The previous prime is 91908527. The next prime is 91908539. The reversal of 91908534 is 43580919.

It is a junction number, because it is equal to n+sod(n) for n = 91908492 and 91908501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91908539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1894 + ... + 13689.

It is an arithmetic number, because the mean of its divisors is an integer number (11500992).

Almost surely, 2^91908534 is an apocalyptic number.

91908534 is an abundant number, since it is smaller than the sum of its proper divisors (92107338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91908534 is a wasteful number, since it uses less digits than its factorization.

91908534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16571.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 91908534 is about 9586.8938661070. The cubic root of 91908534 is about 451.2860887899.

The spelling of 91908534 in words is "ninety-one million, nine hundred eight thousand, five hundred thirty-four".