172438429 has 16 divisors (see below), whose sum is σ = 191600640. Its totient is φ = 154359040.

The previous prime is 172438417. The next prime is 172438451. The reversal of 172438429 is 924834271.

It is a cyclic number.

It is not a de Polignac number, because 172438429 - 2⁹ = 172437917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172438391 and 172438400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172438459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73527 + ... + 75835.

It is an arithmetic number, because the mean of its divisors is an integer number (11975040).

Almost surely, 2^172438429 is an apocalyptic number.

It is an amenable number.

172438429 is a deficient number, since it is larger than the sum of its proper divisors (19162211).

172438429 is a wasteful number, since it uses less digits than its factorization.

172438429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540.

The product of its digits is 96768, while the sum is 40.

The square root of 172438429 is about 13131.5813594555. The cubic root of 172438429 is about 556.6019017405.

The spelling of 172438429 in words is "one hundred seventy-two million, four hundred thirty-eight thousand, four hundred twenty-nine".