172439371 has 4 divisors (see below), whose sum is σ = 185703952. Its totient is φ = 159174792.

The previous prime is 172439299. The next prime is 172439387. The reversal of 172439371 is 173934271.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172439371 - 2¹³ = 172431179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172439371.

It is not an unprimeable number, because it can be changed into a prime (172436371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6632271 + ... + 6632296.

It is an arithmetic number, because the mean of its divisors is an integer number (46425988).

Almost surely, 2^172439371 is an apocalyptic number.

172439371 is a deficient number, since it is larger than the sum of its proper divisors (13264581).

172439371 is a wasteful number, since it uses less digits than its factorization.

172439371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13264580.

The product of its digits is 31752, while the sum is 37.

The square root of 172439371 is about 13131.6172271354. The cubic root of 172439371 is about 556.6029152772.

The spelling of 172439371 in words is "one hundred seventy-two million, four hundred thirty-nine thousand, three hundred seventy-one".