442991313 has 12 divisors (see below), whose sum is σ = 643094400. Its totient is φ = 293842296.

The previous prime is 442991299. The next prime is 442991317. The reversal of 442991313 is 313199244.

It is not a de Polignac number, because 442991313 - 2¹⁷ = 442860241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442991317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121881 + ... + 125462.

It is an arithmetic number, because the mean of its divisors is an integer number (53591200).

Almost surely, 2^442991313 is an apocalyptic number.

It is an amenable number.

442991313 is a deficient number, since it is larger than the sum of its proper divisors (200103087).

442991313 is a wasteful number, since it uses less digits than its factorization.

442991313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247548 (or 247545 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 442991313 is about 21047.3588129247. The cubic root of 442991313 is about 762.3102101503.

The spelling of 442991313 in words is "four hundred forty-two million, nine hundred ninety-one thousand, three hundred thirteen".