91751672 has 16 divisors (see below), whose sum is σ = 172776240. Its totient is φ = 45678016.

The previous prime is 91751663. The next prime is 91751683. The reversal of 91751672 is 27615719.

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, 22748 + ... + 26475.

It is an arithmetic number, because the mean of its divisors is an integer number (10798515).

Almost surely, 2^91751672 is an apocalyptic number.

It is an amenable number.

91751672 is a deficient number, since it is larger than the sum of its proper divisors (81024568).

91751672 is a wasteful number, since it uses less digits than its factorization.

91751672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49462 (or 49458 counting only the distinct ones).

The product of its digits is 26460, while the sum is 38.

The square root of 91751672 is about 9578.7093076259. The cubic root of 91751672 is about 451.0292031440.

The spelling of 91751672 in words is "ninety-one million, seven hundred fifty-one thousand, six hundred seventy-two".