442274813 has 2 divisors, whose sum is σ = 442274814. Its totient is φ = 442274812.

The previous prime is 442274783. The next prime is 442274821. The reversal of 442274813 is 318472244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437771929 + 4502884 = 20923^2 + 2122^2 .

It is a cyclic number.

It is not a de Polignac number, because 442274813 - 2⁸ = 442274557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442279813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221137406 + 221137407.

It is an arithmetic number, because the mean of its divisors is an integer number (221137407).

Almost surely, 2^442274813 is an apocalyptic number.

It is an amenable number.

442274813 is a deficient number, since it is larger than the sum of its proper divisors (1).

442274813 is an equidigital number, since it uses as much as digits as its factorization.

442274813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 35.

The square root of 442274813 is about 21030.3307867470. The cubic root of 442274813 is about 761.8989981702.

The spelling of 442274813 in words is "four hundred forty-two million, two hundred seventy-four thousand, eight hundred thirteen".