91279516 has 12 divisors (see below), whose sum is σ = 160245288. Its totient is φ = 45495152.

The previous prime is 91279459. The next prime is 91279519. The reversal of 91279516 is 61597219.

91279516 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

91279516 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91279519) 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, 34726 + ... + 37261.

It is an arithmetic number, because the mean of its divisors is an integer number (13353774).

Almost surely, 2^91279516 is an apocalyptic number.

91279516 is the 6043-rd centered pentagonal number.

It is an amenable number.

91279516 is a deficient number, since it is larger than the sum of its proper divisors (68965772).

91279516 is a wasteful number, since it uses less digits than its factorization.

91279516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72308 (or 72306 counting only the distinct ones).

The product of its digits is 34020, while the sum is 40.

The square root of 91279516 is about 9554.0314004089. The cubic root of 91279516 is about 450.2542036991.

The spelling of 91279516 in words is "ninety-one million, two hundred seventy-nine thousand, five hundred sixteen".