447842397391 has 2 divisors, whose sum is σ = 447842397392. Its totient is φ = 447842397390.

The previous prime is 447842397377. The next prime is 447842397397. The reversal of 447842397391 is 193793248744.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 447842397391 - 2⁹ = 447842396879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447842397397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223921198695 + 223921198696.

It is an arithmetic number, because the mean of its divisors is an integer number (223921198696).

Almost surely, 2^447842397391 is an apocalyptic number.

447842397391 is a deficient number, since it is larger than the sum of its proper divisors (1).

447842397391 is an equidigital number, since it uses as much as digits as its factorization.

447842397391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36578304, while the sum is 61.

The spelling of 447842397391 in words is "four hundred forty-seven billion, eight hundred forty-two million, three hundred ninety-seven thousand, three hundred ninety-one".