91977412 has 48 divisors (see below), whose sum is σ = 176964480. Its totient is φ = 41651712.

The previous prime is 91977407. The next prime is 91977443. The reversal of 91977412 is 21477919.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349593 + ... + 349855.

It is an arithmetic number, because the mean of its divisors is an integer number (3686760).

Almost surely, 2^91977412 is an apocalyptic number.

It is an amenable number.

91977412 is a deficient number, since it is larger than the sum of its proper divisors (84987068).

91977412 is a wasteful number, since it uses less digits than its factorization.

91977412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 458 counting only the distinct ones).

The product of its digits is 31752, while the sum is 40.

The square root of 91977412 is about 9590.4854934461. The cubic root of 91977412 is about 451.3987947604.

The spelling of 91977412 in words is "ninety-one million, nine hundred seventy-seven thousand, four hundred twelve".