944239913 has 8 divisors (see below), whose sum is σ = 979247880. Its totient is φ = 909395200.

The previous prime is 944239897. The next prime is 944239931. The reversal of 944239913 is 319932449.

It can be written as a sum of positive squares in 4 ways, for example, as 489825424 + 454414489 = 22132^2 + 21317^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 944239913 - 2⁴ = 944239897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (944230913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28970 + ... + 52227.

It is an arithmetic number, because the mean of its divisors is an integer number (122405985).

Almost surely, 2^944239913 is an apocalyptic number.

It is an amenable number.

944239913 is a deficient number, since it is larger than the sum of its proper divisors (35007967).

944239913 is a wasteful number, since it uses less digits than its factorization.

944239913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81627.

The product of its digits is 209952, while the sum is 44.

The square root of 944239913 is about 30728.4869949693. The cubic root of 944239913 is about 981.0567224880.

The spelling of 944239913 in words is "nine hundred forty-four million, two hundred thirty-nine thousand, nine hundred thirteen".