442497353 has 2 divisors, whose sum is σ = 442497354. Its totient is φ = 442497352.

The previous prime is 442497343. The next prime is 442497389. The reversal of 442497353 is 353794244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354644224 + 87853129 = 18832^2 + 9373^2 .

It is a cyclic number.

It is not a de Polignac number, because 442497353 - 2²² = 438303049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442497353.

It is not a weakly prime, because it can be changed into another prime (442497343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221248676 + 221248677.

It is an arithmetic number, because the mean of its divisors is an integer number (221248677).

Almost surely, 2^442497353 is an apocalyptic number.

It is an amenable number.

442497353 is a deficient number, since it is larger than the sum of its proper divisors (1).

442497353 is an equidigital number, since it uses as much as digits as its factorization.

442497353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 41.

The square root of 442497353 is about 21035.6210509697. The cubic root of 442497353 is about 762.0267653171.

The spelling of 442497353 in words is "four hundred forty-two million, four hundred ninety-seven thousand, three hundred fifty-three".