91634539 has 4 divisors (see below), whose sum is σ = 97024824. Its totient is φ = 86244256.

The previous prime is 91634531. The next prime is 91634567. The reversal of 91634539 is 93543619.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91634539 - 2³ = 91634531 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91634531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2695117 + ... + 2695150.

It is an arithmetic number, because the mean of its divisors is an integer number (24256206).

Almost surely, 2^91634539 is an apocalyptic number.

91634539 is a deficient number, since it is larger than the sum of its proper divisors (5390285).

91634539 is a wasteful number, since it uses less digits than its factorization.

91634539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5390284.

The product of its digits is 87480, while the sum is 40.

The square root of 91634539 is about 9572.5931178547. The cubic root of 91634539 is about 450.8371888367.

The spelling of 91634539 in words is "ninety-one million, six hundred thirty-four thousand, five hundred thirty-nine".