442973969 has 2 divisors, whose sum is σ = 442973970. Its totient is φ = 442973968.

The previous prime is 442973941. The next prime is 442973977. The reversal of 442973969 is 969379244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427662400 + 15311569 = 20680^2 + 3913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442973969 is a prime.

It is a super-2 number, since 2×442973969² = 392451874423225922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 442973969.

It is not a weakly prime, because it can be changed into another prime (442973669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221486984 + 221486985.

It is an arithmetic number, because the mean of its divisors is an integer number (221486985).

Almost surely, 2^442973969 is an apocalyptic number.

It is an amenable number.

442973969 is a deficient number, since it is larger than the sum of its proper divisors (1).

442973969 is an equidigital number, since it uses as much as digits as its factorization.

442973969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 53.

The square root of 442973969 is about 21046.9467856979. The cubic root of 442973969 is about 762.3002613617.

The spelling of 442973969 in words is "four hundred forty-two million, nine hundred seventy-three thousand, nine hundred sixty-nine".