91516723 has 4 divisors (see below), whose sum is σ = 91735560. Its totient is φ = 91297888.

The previous prime is 91516709. The next prime is 91516741. The reversal of 91516723 is 32761519.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91516723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91516703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108790 + ... + 109627.

It is an arithmetic number, because the mean of its divisors is an integer number (22933890).

Almost surely, 2^91516723 is an apocalyptic number.

91516723 is a deficient number, since it is larger than the sum of its proper divisors (218837).

91516723 is a wasteful number, since it uses less digits than its factorization.

91516723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218836.

The product of its digits is 11340, while the sum is 34.

The square root of 91516723 is about 9566.4373201313. The cubic root of 91516723 is about 450.6438897631.

The spelling of 91516723 in words is "ninety-one million, five hundred sixteen thousand, seven hundred twenty-three".