442023013 has 4 divisors (see below), whose sum is σ = 446078380. Its totient is φ = 437967648.

The previous prime is 442023007. The next prime is 442023031. The reversal of 442023013 is 310320244.

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 243297604 + 198725409 = 15598^2 + 14097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442023013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442023073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2027520 + ... + 2027737.

It is an arithmetic number, because the mean of its divisors is an integer number (111519595).

Almost surely, 2^442023013 is an apocalyptic number.

It is an amenable number.

442023013 is a deficient number, since it is larger than the sum of its proper divisors (4055367).

442023013 is a wasteful number, since it uses less digits than its factorization.

442023013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055366.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 442023013 is about 21024.3433428966. The cubic root of 442023013 is about 761.7543802528.

Adding to 442023013 its reverse (310320244), we get a palindrome (752343257).

The spelling of 442023013 in words is "four hundred forty-two million, twenty-three thousand, thirteen".