442999399 has 2 divisors, whose sum is σ = 442999400. Its totient is φ = 442999398.

The previous prime is 442999391. The next prime is 442999423. The reversal of 442999399 is 993999244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442999399 - 2³ = 442999391 is a prime.

It is a super-2 number, since 2×442999399² = 392496935028722402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442999391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221499699 + 221499700.

It is an arithmetic number, because the mean of its divisors is an integer number (221499700).

Almost surely, 2^442999399 is an apocalyptic number.

442999399 is a deficient number, since it is larger than the sum of its proper divisors (1).

442999399 is an equidigital number, since it uses as much as digits as its factorization.

442999399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5668704, while the sum is 58.

The square root of 442999399 is about 21047.5509026585. The cubic root of 442999399 is about 762.3148483172.

The spelling of 442999399 in words is "four hundred forty-two million, nine hundred ninety-nine thousand, three hundred ninety-nine".