91197836 has 12 divisors (see below), whose sum is σ = 159879720. Its totient is φ = 45517920.

The previous prime is 91197823. The next prime is 91197839. The reversal of 91197836 is 63879119.

It is not an unprimeable number, because it can be changed into a prime (91197839) 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, 17681 + ... + 22248.

It is an arithmetic number, because the mean of its divisors is an integer number (13323310).

Almost surely, 2^91197836 is an apocalyptic number.

It is an amenable number.

91197836 is a deficient number, since it is larger than the sum of its proper divisors (68681884).

91197836 is a wasteful number, since it uses less digits than its factorization.

91197836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40504 (or 40502 counting only the distinct ones).

The product of its digits is 81648, while the sum is 44.

The square root of 91197836 is about 9549.7558083964. The cubic root of 91197836 is about 450.1198627205.

The spelling of 91197836 in words is "ninety-one million, one hundred ninety-seven thousand, eight hundred thirty-six".