172339429 has 4 divisors (see below), whose sum is σ = 172994976. Its totient is φ = 171683884.

The previous prime is 172339403. The next prime is 172339487. The reversal of 172339429 is 924933271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 924933271 = 599 ⋅1544129.

It is a cyclic number.

It is not a de Polignac number, because 172339429 - 2⁷ = 172339301 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172339391 and 172339400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172339499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327379 + ... + 327904.

It is an arithmetic number, because the mean of its divisors is an integer number (43248744).

Almost surely, 2^172339429 is an apocalyptic number.

It is an amenable number.

172339429 is a deficient number, since it is larger than the sum of its proper divisors (655547).

172339429 is an equidigital number, since it uses as much as digits as its factorization.

172339429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655546.

The product of its digits is 81648, while the sum is 40.

The square root of 172339429 is about 13127.8112798745. The cubic root of 172339429 is about 556.4953629655.

It can be divided in two parts, 17233 and 9429, that added together give a palindrome (26662).

The spelling of 172339429 in words is "one hundred seventy-two million, three hundred thirty-nine thousand, four hundred twenty-nine".