91891716 has 48 divisors (see below), whose sum is σ = 255704064. Its totient is φ = 25112736.

The previous prime is 91891711. The next prime is 91891741. The reversal of 91891716 is 61719819.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (91891711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21850 + ... + 25713.

It is an arithmetic number, because the mean of its divisors is an integer number (5327168).

Almost surely, 2^91891716 is an apocalyptic number.

It is an amenable number.

91891716 is an abundant number, since it is smaller than the sum of its proper divisors (163812348).

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

91891716 is a wasteful number, since it uses less digits than its factorization.

91891716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47600 (or 47598 counting only the distinct ones).

The product of its digits is 27216, while the sum is 42.

The square root of 91891716 is about 9586.0166909932. The cubic root of 91891716 is about 451.2585607244.

The spelling of 91891716 in words is "ninety-one million, eight hundred ninety-one thousand, seven hundred sixteen".