442913 has 4 divisors (see below), whose sum is σ = 450480. Its totient is φ = 435348.

The previous prime is 442903. The next prime is 442919. The reversal of 442913 is 319244.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442913 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 442913.

It is not an unprimeable number, because it can be changed into a prime (442919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3695 + ... + 3812.

It is an arithmetic number, because the mean of its divisors is an integer number (112620).

2⁴⁴²⁹¹³ is an apocalyptic number.

It is an amenable number.

442913 is a deficient number, since it is larger than the sum of its proper divisors (7567).

442913 is an equidigital number, since it uses as much as digits as its factorization.

442913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7566.

The product of its digits is 864, while the sum is 23.

The square root of 442913 is about 665.5170921922. The cubic root of 442913 is about 76.2265286532.

The spelling of 442913 in words is "four hundred forty-two thousand, nine hundred thirteen".