91317013 has 8 divisors (see below), whose sum is σ = 96877080. Its totient is φ = 85777920.

The previous prime is 91317011. The next prime is 91317043. The reversal of 91317013 is 31071319.

It can be written as a sum of positive squares in 4 ways, for example, as 9721924 + 81595089 = 3118^2 + 9033^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91317013 - 2¹ = 91317011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91317011) 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 in 7 ways as a sum of consecutive naturals, for example, 4233 + ... + 14161.

It is an arithmetic number, because the mean of its divisors is an integer number (12109635).

Almost surely, 2^91317013 is an apocalyptic number.

It is an amenable number.

91317013 is a deficient number, since it is larger than the sum of its proper divisors (5560067).

91317013 is a wasteful number, since it uses less digits than its factorization.

91317013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10487.

The product of its (nonzero) digits is 567, while the sum is 25.

The square root of 91317013 is about 9555.9935642507. The cubic root of 91317013 is about 450.3158490398.

The spelling of 91317013 in words is "ninety-one million, three hundred seventeen thousand, thirteen".