91379886 has 32 divisors (see below), whose sum is σ = 197503488. Its totient is φ = 28019040.

The previous prime is 91379863. The next prime is 91379921. The reversal of 91379886 is 68897319.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22375 + ... + 26141.

It is an arithmetic number, because the mean of its divisors is an integer number (6171984).

Almost surely, 2^91379886 is an apocalyptic number.

91379886 is an abundant number, since it is smaller than the sum of its proper divisors (106123602).

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

91379886 is a wasteful number, since it uses less digits than its factorization.

91379886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4096.

The product of its digits is 653184, while the sum is 51.

The square root of 91379886 is about 9559.2827136768. The cubic root of 91379886 is about 450.4191748496.

The spelling of 91379886 in words is "ninety-one million, three hundred seventy-nine thousand, eight hundred eighty-six".