91123160 has 16 divisors (see below), whose sum is σ = 205027200. Its totient is φ = 36449248.

The previous prime is 91123157. The next prime is 91123211. The reversal of 91123160 is 6132119.

It is a happy number.

It is a congruent number.

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, 1139000 + ... + 1139079.

It is an arithmetic number, because the mean of its divisors is an integer number (12814200).

Almost surely, 2^91123160 is an apocalyptic number.

It is an amenable number.

91123160 is an abundant number, since it is smaller than the sum of its proper divisors (113904040).

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

91123160 is a wasteful number, since it uses less digits than its factorization.

91123160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278090 (or 2278086 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 91123160 is about 9545.8451694965. The cubic root of 91123160 is about 449.9969711730.

Adding to 91123160 its reverse (6132119), we get a palindrome (97255279).

The spelling of 91123160 in words is "ninety-one million, one hundred twenty-three thousand, one hundred sixty".