91211936 has 48 divisors (see below), whose sum is σ = 192036096. Its totient is φ = 42494976.

The previous prime is 91211933. The next prime is 91211947. The reversal of 91211936 is 63911219.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (91211933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57425 + ... + 58991.

It is an arithmetic number, because the mean of its divisors is an integer number (4000752).

Almost surely, 2^91211936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91211936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96018048).

91211936 is an abundant number, since it is smaller than the sum of its proper divisors (100824160).

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

91211936 is a wasteful number, since it uses less digits than its factorization.

91211936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 1693 counting only the distinct ones).

The product of its digits is 2916, while the sum is 32.

The square root of 91211936 is about 9550.4940186359. The cubic root of 91211936 is about 450.1430590422.

The spelling of 91211936 in words is "ninety-one million, two hundred eleven thousand, nine hundred thirty-six".