442022923 has 2 divisors, whose sum is σ = 442022924. Its totient is φ = 442022922.

The previous prime is 442022881. The next prime is 442022939. The reversal of 442022923 is 329220244.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442022923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442022891 and 442022900.

It is not a weakly prime, because it can be changed into another prime (442022963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221011461 + 221011462.

It is an arithmetic number, because the mean of its divisors is an integer number (221011462).

Almost surely, 2^442022923 is an apocalyptic number.

442022923 is a deficient number, since it is larger than the sum of its proper divisors (1).

442022923 is an equidigital number, since it uses as much as digits as its factorization.

442022923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 442022923 is about 21024.3412025205. The cubic root of 442022923 is about 761.7543285527.

The spelling of 442022923 in words is "four hundred forty-two million, twenty-two thousand, nine hundred twenty-three".