91310642 has 16 divisors (see below), whose sum is σ = 139669920. Its totient is φ = 44758368.

The previous prime is 91310591. The next prime is 91310671. The reversal of 91310642 is 24601319.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54278 + ... + 55934.

It is an arithmetic number, because the mean of its divisors is an integer number (8729370).

Almost surely, 2^91310642 is an apocalyptic number.

91310642 is a deficient number, since it is larger than the sum of its proper divisors (48359278).

91310642 is a wasteful number, since it uses less digits than its factorization.

91310642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 91310642 is about 9555.6602074373. The cubic root of 91310642 is about 450.3053762596.

The spelling of 91310642 in words is "ninety-one million, three hundred ten thousand, six hundred forty-two".