172342243439 has 2 divisors, whose sum is σ = 172342243440. Its totient is φ = 172342243438.

The previous prime is 172342243433. The next prime is 172342243457. The reversal of 172342243439 is 934342243271.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172342243439 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172342243439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172342243433) 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, 86171121719 + 86171121720.

It is an arithmetic number, because the mean of its divisors is an integer number (86171121720).

Almost surely, 2^172342243439 is an apocalyptic number.

172342243439 is a deficient number, since it is larger than the sum of its proper divisors (1).

172342243439 is an equidigital number, since it uses as much as digits as its factorization.

172342243439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 44.

The spelling of 172342243439 in words is "one hundred seventy-two billion, three hundred forty-two million, two hundred forty-three thousand, four hundred thirty-nine".