91316458 has 4 divisors (see below), whose sum is σ = 136974690. Its totient is φ = 45658228.

The previous prime is 91316453. The next prime is 91316521. The reversal of 91316458 is 85461319.

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

It can be written as a sum of positive squares in only one way, i.e., 83119689 + 8196769 = 9117^2 + 2863^2 .

It is not an unprimeable number, because it can be changed into a prime (91316453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22829113 + ... + 22829116.

Almost surely, 2^91316458 is an apocalyptic number.

91316458 is a deficient number, since it is larger than the sum of its proper divisors (45658232).

91316458 is a wasteful number, since it uses less digits than its factorization.

91316458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45658231.

The product of its digits is 25920, while the sum is 37.

The square root of 91316458 is about 9555.9645248400. The cubic root of 91316458 is about 450.3149367388.

It can be divided in two parts, 913 and 16458, that added together give a palindrome (17371).

The spelling of 91316458 in words is "ninety-one million, three hundred sixteen thousand, four hundred fifty-eight".