44391313 has 4 divisors (see below), whose sum is σ = 44415540. Its totient is φ = 44367088.

The previous prime is 44391307. The next prime is 44391323. The reversal of 44391313 is 31319344.

44391313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5303809 + 39087504 = 2303^2 + 6252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44391313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44391323) 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 3 ways as a sum of consecutive naturals, for example, 9118 + ... + 13111.

It is an arithmetic number, because the mean of its divisors is an integer number (11103885).

Almost surely, 2^44391313 is an apocalyptic number.

It is an amenable number.

44391313 is a deficient number, since it is larger than the sum of its proper divisors (24227).

44391313 is a wasteful number, since it uses less digits than its factorization.

44391313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24226.

The product of its digits is 3888, while the sum is 28.

The square root of 44391313 is about 6662.6806166888. The cubic root of 44391313 is about 354.0783153148.

The spelling of 44391313 in words is "forty-four million, three hundred ninety-one thousand, three hundred thirteen".