442013393 has 2 divisors, whose sum is σ = 442013394. Its totient is φ = 442013392.

The previous prime is 442013387. The next prime is 442013441. The reversal of 442013393 is 393310244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 441336064 + 677329 = 21008^2 + 823^2 .

It is a cyclic number.

It is not a de Polignac number, because 442013393 - 2⁶ = 442013329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (442013323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221006696 + 221006697.

It is an arithmetic number, because the mean of its divisors is an integer number (221006697).

Almost surely, 2^442013393 is an apocalyptic number.

It is an amenable number.

442013393 is a deficient number, since it is larger than the sum of its proper divisors (1).

442013393 is an equidigital number, since it uses as much as digits as its factorization.

442013393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 442013393 is about 21024.1145592389. The cubic root of 442013393 is about 761.7488540471.

The spelling of 442013393 in words is "four hundred forty-two million, thirteen thousand, three hundred ninety-three".