91326138 has 16 divisors (see below), whose sum is σ = 187589280. Its totient is φ = 29619216.

The previous prime is 91326127. The next prime is 91326143. The reversal of 91326138 is 83162319.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91326099 and 91326108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205468 + ... + 205911.

It is an arithmetic number, because the mean of its divisors is an integer number (11724330).

Almost surely, 2^91326138 is an apocalyptic number.

91326138 is an abundant number, since it is smaller than the sum of its proper divisors (96263142).

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

91326138 is a wasteful number, since it uses less digits than its factorization.

91326138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411421.

The product of its digits is 7776, while the sum is 33.

The square root of 91326138 is about 9556.4710013687. The cubic root of 91326138 is about 450.3308480530.

The spelling of 91326138 in words is "ninety-one million, three hundred twenty-six thousand, one hundred thirty-eight".