91327964 has 72 divisors (see below), whose sum is σ = 203375088. Its totient is φ = 35562240.

The previous prime is 91327933. The next prime is 91327969. The reversal of 91327964 is 46972319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91327969) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185759 + ... + 186249.

It is an arithmetic number, because the mean of its divisors is an integer number (2824654).

Almost surely, 2^91327964 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 91327964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101687544).

91327964 is an abundant number, since it is smaller than the sum of its proper divisors (112047124).

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

91327964 is a wasteful number, since it uses less digits than its factorization.

91327964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595 (or 586 counting only the distinct ones).

The product of its digits is 81648, while the sum is 41.

The square root of 91327964 is about 9556.5665382500. The cubic root of 91327964 is about 450.3338493794. Note that the first 3 decimals are identical.

The spelling of 91327964 in words is "ninety-one million, three hundred twenty-seven thousand, nine hundred sixty-four".