239419394455391 has 2 divisors, whose sum is σ = 239419394455392. Its totient is φ = 239419394455390.

The previous prime is 239419394455387. The next prime is 239419394455429. The reversal of 239419394455391 is 193554493914932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 239419394455391 - 2² = 239419394455387 is a prime.

It is a super-2 number, since 2×239419394455391² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239419394455301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119709697227695 + 119709697227696.

It is an arithmetic number, because the mean of its divisors is an integer number (119709697227696).

Almost surely, 2^{239419394455391} is an apocalyptic number.

239419394455391 is a deficient number, since it is larger than the sum of its proper divisors (1).

239419394455391 is an equidigital number, since it uses as much as digits as its factorization.

239419394455391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 566870400, while the sum is 71.

The spelling of 239419394455391 in words is "two hundred thirty-nine trillion, four hundred nineteen billion, three hundred ninety-four million, four hundred fifty-five thousand, three hundred ninety-one".