442297913 has 4 divisors (see below), whose sum is σ = 442343028. Its totient is φ = 442252800.

The previous prime is 442297909. The next prime is 442297931. The reversal of 442297913 is 319792244.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 429815824 + 12482089 = 20732^2 + 3533^2 .

It is a cyclic number.

It is not a de Polignac number, because 442297913 - 2² = 442297909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442297813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 956 + ... + 29757.

It is an arithmetic number, because the mean of its divisors is an integer number (110585757).

Almost surely, 2^442297913 is an apocalyptic number.

It is an amenable number.

442297913 is a deficient number, since it is larger than the sum of its proper divisors (45115).

442297913 is a wasteful number, since it uses less digits than its factorization.

442297913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45114.

The product of its digits is 108864, while the sum is 41.

The square root of 442297913 is about 21030.8799863439. The cubic root of 442297913 is about 761.9122625931.

The spelling of 442297913 in words is "four hundred forty-two million, two hundred ninety-seven thousand, nine hundred thirteen".