91867612 has 12 divisors (see below), whose sum is σ = 167758416. Its totient is φ = 43936640.

The previous prime is 91867597. The next prime is 91867627. The reversal of 91867612 is 21676819.

It is an interprime number because it is at equal distance from previous prime (91867597) and next prime (91867627).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499189 + ... + 499372.

It is an arithmetic number, because the mean of its divisors is an integer number (13979868).

Almost surely, 2^91867612 is an apocalyptic number.

91867612 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

91867612 is a deficient number, since it is larger than the sum of its proper divisors (75890804).

91867612 is a wasteful number, since it uses less digits than its factorization.

91867612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998588 (or 998586 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 91867612 is about 9584.7593605682. The cubic root of 91867612 is about 451.2191009196.

The spelling of 91867612 in words is "ninety-one million, eight hundred sixty-seven thousand, six hundred twelve".