172387239 has 8 divisors (see below), whose sum is σ = 229931520. Its totient is φ = 114883896.

The previous prime is 172387213. The next prime is 172387261. The reversal of 172387239 is 932783271.

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

It is not a de Polignac number, because 172387239 - 2⁸ = 172386983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172387239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172387639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1524 + ... + 18630.

It is an arithmetic number, because the mean of its divisors is an integer number (28741440).

Almost surely, 2^172387239 is an apocalyptic number.

172387239 is a deficient number, since it is larger than the sum of its proper divisors (57544281).

172387239 is a wasteful number, since it uses less digits than its factorization.

172387239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20469.

The product of its digits is 127008, while the sum is 42.

The square root of 172387239 is about 13129.6320969020. The cubic root of 172387239 is about 556.5468187535.

The spelling of 172387239 in words is "one hundred seventy-two million, three hundred eighty-seven thousand, two hundred thirty-nine".