91234764 has 36 divisors (see below), whose sum is σ = 231036624. Its totient is φ = 30356832.

The previous prime is 91234763. The next prime is 91234769. The reversal of 91234764 is 46743219.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (91234763) 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 11 ways as a sum of consecutive naturals, for example, 21334 + ... + 25250.

It is an arithmetic number, because the mean of its divisors is an integer number (6417684).

Almost surely, 2^91234764 is an apocalyptic number.

It is an amenable number.

91234764 is an abundant number, since it is smaller than the sum of its proper divisors (139801860).

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

91234764 is a wasteful number, since it uses less digits than its factorization.

91234764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574 (or 4569 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 91234764 is about 9551.6890652910. The cubic root of 91234764 is about 450.1806089838.

The spelling of 91234764 in words is "ninety-one million, two hundred thirty-four thousand, seven hundred sixty-four".