91872512 has 18 divisors (see below), whose sum is σ = 183386658. Its totient is φ = 45936128.

The previous prime is 91872491. The next prime is 91872533. The reversal of 91872512 is 21527819.

It is an interprime number because it is at equal distance from previous prime (91872491) and next prime (91872533).

It can be written as a sum of positive squares in only one way, i.e., 86415616 + 5456896 = 9296^2 + 2336^2 .

It is a super-2 number, since 2×91872512² = 16881116922380288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 179183 + ... + 179694.

Almost surely, 2^91872512 is an apocalyptic number.

It is an amenable number.

91872512 is a deficient number, since it is larger than the sum of its proper divisors (91514146).

91872512 is an equidigital number, since it uses as much as digits as its factorization.

91872512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358893 (or 358879 counting only the distinct ones).

The product of its digits is 10080, while the sum is 35.

The square root of 91872512 is about 9585.0149712976. The cubic root of 91872512 is about 451.2271230950.

The spelling of 91872512 in words is "ninety-one million, eight hundred seventy-two thousand, five hundred twelve".