172322929 has 2 divisors, whose sum is σ = 172322930. Its totient is φ = 172322928.

The previous prime is 172322921. The next prime is 172322939. The reversal of 172322929 is 929223271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168402529 + 3920400 = 12977^2 + 1980^2 .

It is an emirp because it is prime and its reverse (929223271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172322929 - 2³ = 172322921 is a prime.

It is not a weakly prime, because it can be changed into another prime (172322921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86161464 + 86161465.

It is an arithmetic number, because the mean of its divisors is an integer number (86161465).

Almost surely, 2^172322929 is an apocalyptic number.

It is an amenable number.

172322929 is a deficient number, since it is larger than the sum of its proper divisors (1).

172322929 is an equidigital number, since it uses as much as digits as its factorization.

172322929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 172322929 is about 13127.1828280100. The cubic root of 172322929 is about 556.4776025366.

The spelling of 172322929 in words is "one hundred seventy-two million, three hundred twenty-two thousand, nine hundred twenty-nine".