91234972 has 12 divisors (see below), whose sum is σ = 162044680. Its totient is φ = 44936496.

The previous prime is 91234909. The next prime is 91234973. The reversal of 91234972 is 27943219.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91234973) 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 3 ways as a sum of consecutive naturals, for example, 169947 + ... + 170482.

Almost surely, 2^91234972 is an apocalyptic number.

It is an amenable number.

91234972 is a deficient number, since it is larger than the sum of its proper divisors (70809708).

91234972 is a wasteful number, since it uses less digits than its factorization.

91234972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340500 (or 340498 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 91234972 is about 9551.6999534114. The cubic root of 91234972 is about 450.1809510957.

The spelling of 91234972 in words is "ninety-one million, two hundred thirty-four thousand, nine hundred seventy-two".