91321132 has 24 divisors (see below), whose sum is σ = 190584576. Its totient is φ = 37435728.

The previous prime is 91321117. The next prime is 91321147. The reversal of 91321132 is 23112319.

It is an interprime number because it is at equal distance from previous prime (91321117) and next prime (91321147).

It is a super-2 number, since 2×91321132² = 16679098299522848, which contains 22 as substring.

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, 70258 + ... + 71545.

It is an arithmetic number, because the mean of its divisors is an integer number (7941024).

Almost surely, 2^91321132 is an apocalyptic number.

91321132 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

91321132 is an abundant number, since it is smaller than the sum of its proper divisors (99263444).

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

91321132 is a wasteful number, since it uses less digits than its factorization.

91321132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141837 (or 141835 counting only the distinct ones).

The product of its digits is 324, while the sum is 22.

The square root of 91321132 is about 9556.2090810112. The cubic root of 91321132 is about 450.3226196770.

The spelling of 91321132 in words is "ninety-one million, three hundred twenty-one thousand, one hundred thirty-two".