91115132 has 6 divisors (see below), whose sum is σ = 159451488. Its totient is φ = 45557564.

The previous prime is 91115131. The next prime is 91115137. The reversal of 91115132 is 23151119.

It is a junction number, because it is equal to n+sod(n) for n = 91115098 and 91115107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91115131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11389388 + ... + 11389395.

It is an arithmetic number, because the mean of its divisors is an integer number (26575248).

Almost surely, 2^91115132 is an apocalyptic number.

It is an amenable number.

91115132 is a deficient number, since it is larger than the sum of its proper divisors (68336356).

91115132 is a wasteful number, since it uses less digits than its factorization.

91115132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22778787 (or 22778785 counting only the distinct ones).

The product of its digits is 270, while the sum is 23.

The square root of 91115132 is about 9545.4246631567. The cubic root of 91115132 is about 449.9837557922.

The spelling of 91115132 in words is "ninety-one million, one hundred fifteen thousand, one hundred thirty-two".