91013313 has 4 divisors (see below), whose sum is σ = 121351088. Its totient is φ = 60675540.

The previous prime is 91013311. The next prime is 91013333. The reversal of 91013313 is 31331019.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 91013313 - 2¹ = 91013311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91013313.

It is not an unprimeable number, because it can be changed into a prime (91013311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15168883 + ... + 15168888.

It is an arithmetic number, because the mean of its divisors is an integer number (30337772).

Almost surely, 2^91013313 is an apocalyptic number.

It is an amenable number.

91013313 is a deficient number, since it is larger than the sum of its proper divisors (30337775).

91013313 is a wasteful number, since it uses less digits than its factorization.

91013313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30337774.

The product of its (nonzero) digits is 243, while the sum is 21.

The square root of 91013313 is about 9540.0897794518. The cubic root of 91013313 is about 449.8160779248.

The spelling of 91013313 in words is "ninety-one million, thirteen thousand, three hundred thirteen".