172381856239 has 2 divisors, whose sum is σ = 172381856240. Its totient is φ = 172381856238.

The previous prime is 172381856233. The next prime is 172381856249. The reversal of 172381856239 is 932658183271.

It is a weak prime.

It is an emirp because it is prime and its reverse (932658183271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172381856239 - 2¹¹ = 172381854191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172381856239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172381856233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86190928119 + 86190928120.

It is an arithmetic number, because the mean of its divisors is an integer number (86190928120).

Almost surely, 2^172381856239 is an apocalyptic number.

172381856239 is a deficient number, since it is larger than the sum of its proper divisors (1).

172381856239 is an equidigital number, since it uses as much as digits as its factorization.

172381856239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 55.

The spelling of 172381856239 in words is "one hundred seventy-two billion, three hundred eighty-one million, eight hundred fifty-six thousand, two hundred thirty-nine".