442999457 has 2 divisors, whose sum is σ = 442999458. Its totient is φ = 442999456.

The previous prime is 442999423. The next prime is 442999541. The reversal of 442999457 is 754999244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439153936 + 3845521 = 20956^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 442999457 - 2²⁰ = 441950881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442999399 and 442999408.

It is not a weakly prime, because it can be changed into another prime (442999357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221499728 + 221499729.

It is an arithmetic number, because the mean of its divisors is an integer number (221499729).

Almost surely, 2^442999457 is an apocalyptic number.

It is an amenable number.

442999457 is a deficient number, since it is larger than the sum of its proper divisors (1).

442999457 is an equidigital number, since it uses as much as digits as its factorization.

442999457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 53.

The square root of 442999457 is about 21047.5522804910. The cubic root of 442999457 is about 762.3148815860.

The spelling of 442999457 in words is "four hundred forty-two million, nine hundred ninety-nine thousand, four hundred fifty-seven".