172439078317 has 8 divisors (see below), whose sum is σ = 188589205152. Its totient is φ = 156367926000.

The previous prime is 172439078309. The next prime is 172439078321. The reversal of 172439078317 is 713870934271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172439078317 - 2³ = 172439078309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172439088317) 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 in 7 ways as a sum of consecutive naturals, for example, 19739059 + ... + 19747792.

It is an arithmetic number, because the mean of its divisors is an integer number (23573650644).

Almost surely, 2^172439078317 is an apocalyptic number.

It is an amenable number.

172439078317 is a deficient number, since it is larger than the sum of its proper divisors (16150126835).

172439078317 is a wasteful number, since it uses less digits than its factorization.

172439078317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39487259.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 172439078317 in words is "one hundred seventy-two billion, four hundred thirty-nine million, seventy-eight thousand, three hundred seventeen".