172232939 has 2 divisors, whose sum is σ = 172232940. Its totient is φ = 172232938.

The previous prime is 172232927. The next prime is 172232941. The reversal of 172232939 is 939232271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172232939 is a prime.

Together with 172232941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172232959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86116469 + 86116470.

It is an arithmetic number, because the mean of its divisors is an integer number (86116470).

Almost surely, 2^172232939 is an apocalyptic number.

172232939 is a deficient number, since it is larger than the sum of its proper divisors (1).

172232939 is an equidigital number, since it uses as much as digits as its factorization.

172232939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 172232939 is about 13123.7547599763. The cubic root of 172232939 is about 556.3807182752.

The spelling of 172232939 in words is "one hundred seventy-two million, two hundred thirty-two thousand, nine hundred thirty-nine".