442694923 has 4 divisors (see below), whose sum is σ = 482939928. Its totient is φ = 402449920.

The previous prime is 442694897. The next prime is 442694939. The reversal of 442694923 is 329496244.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 442694923 - 2⁵ = 442694891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442694923.

It is not an unprimeable number, because it can be changed into a prime (442694963) 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, 20122486 + ... + 20122507.

It is an arithmetic number, because the mean of its divisors is an integer number (120734982).

Almost surely, 2^442694923 is an apocalyptic number.

442694923 is a deficient number, since it is larger than the sum of its proper divisors (40245005).

442694923 is a wasteful number, since it uses less digits than its factorization.

442694923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40245004.

The product of its digits is 373248, while the sum is 43.

The square root of 442694923 is about 21040.3166088346. The cubic root of 442694923 is about 762.1401605165.

The spelling of 442694923 in words is "four hundred forty-two million, six hundred ninety-four thousand, nine hundred twenty-three".