172338247 has 2 divisors, whose sum is σ = 172338248. Its totient is φ = 172338246.

The previous prime is 172338169. The next prime is 172338277. The reversal of 172338247 is 742833271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172338247 - 2²⁷ = 38120519 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172338277) 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 as a sum of consecutive naturals, namely, 86169123 + 86169124.

It is an arithmetic number, because the mean of its divisors is an integer number (86169124).

Almost surely, 2^172338247 is an apocalyptic number.

172338247 is a deficient number, since it is larger than the sum of its proper divisors (1).

172338247 is an equidigital number, since it uses as much as digits as its factorization.

172338247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 37.

The square root of 172338247 is about 13127.7662608686. The cubic root of 172338247 is about 556.4940907107.

The spelling of 172338247 in words is "one hundred seventy-two million, three hundred thirty-eight thousand, two hundred forty-seven".