91818132 has 48 divisors (see below), whose sum is σ = 245317632. Its totient is φ = 26183520.

The previous prime is 91818049. The next prime is 91818137. The reversal of 91818132 is 23181819.

It is a junction number, because it is equal to n+sod(n) for n = 91818093 and 91818102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91818137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82693 + ... + 83795.

It is an arithmetic number, because the mean of its divisors is an integer number (5110784).

Almost surely, 2^91818132 is an apocalyptic number.

It is an amenable number.

91818132 is an abundant number, since it is smaller than the sum of its proper divisors (153499500).

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

91818132 is a wasteful number, since it uses less digits than its factorization.

91818132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108 (or 2106 counting only the distinct ones).

The product of its digits is 3456, while the sum is 33.

The square root of 91818132 is about 9582.1778317875. The cubic root of 91818132 is about 451.1380773316.

The spelling of 91818132 in words is "ninety-one million, eight hundred eighteen thousand, one hundred thirty-two".