442999357 has 2 divisors, whose sum is σ = 442999358. Its totient is φ = 442999356.

The previous prime is 442999321. The next prime is 442999391. The reversal of 442999357 is 753999244.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 439573156 + 3426201 = 20966^2 + 1851^2 .

It is a cyclic number.

It is not a de Polignac number, because 442999357 - 2²³ = 434610749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442999457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221499678 + 221499679.

It is an arithmetic number, because the mean of its divisors is an integer number (221499679).

Almost surely, 2^442999357 is an apocalyptic number.

It is an amenable number.

442999357 is a deficient number, since it is larger than the sum of its proper divisors (1).

442999357 is an equidigital number, since it uses as much as digits as its factorization.

442999357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 52.

The square root of 442999357 is about 21047.5499049177. The cubic root of 442999357 is about 762.3148242259.

The spelling of 442999357 in words is "four hundred forty-two million, nine hundred ninety-nine thousand, three hundred fifty-seven".