91723716 has 72 divisors (see below), whose sum is σ = 278940480. Its totient is φ = 24826176.

The previous prime is 91723651. The next prime is 91723729. The reversal of 91723716 is 61732719.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4791 + ... + 14366.

Almost surely, 2^91723716 is an apocalyptic number.

It is an amenable number.

91723716 is an abundant number, since it is smaller than the sum of its proper divisors (187216764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91723716 is a wasteful number, since it uses less digits than its factorization.

91723716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19193 (or 19188 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 91723716 is about 9577.2499184265. The cubic root of 91723716 is about 450.9833901615.

The spelling of 91723716 in words is "ninety-one million, seven hundred twenty-three thousand, seven hundred sixteen".