442378505873387 has 2 divisors, whose sum is σ = 442378505873388. Its totient is φ = 442378505873386.

The previous prime is 442378505873233. The next prime is 442378505873497. The reversal of 442378505873387 is 783378505873244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442378505873387 - 2⁸ = 442378505873131 is a prime.

It is not a weakly prime, because it can be changed into another prime (442378505870387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221189252936693 + 221189252936694.

It is an arithmetic number, because the mean of its divisors is an integer number (221189252936694).

Almost surely, 2^{442378505873387} is an apocalyptic number.

442378505873387 is a deficient number, since it is larger than the sum of its proper divisors (1).

442378505873387 is an equidigital number, since it uses as much as digits as its factorization.

442378505873387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3793305600, while the sum is 74.

The spelling of 442378505873387 in words is "four hundred forty-two trillion, three hundred seventy-eight billion, five hundred five million, eight hundred seventy-three thousand, three hundred eighty-seven".