172308029 has 2 divisors, whose sum is σ = 172308030. Its totient is φ = 172308028.

The previous prime is 172308023. The next prime is 172308041. The reversal of 172308029 is 920803271.

172308029 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124835929 + 47472100 = 11173^2 + 6890^2 .

It is a cyclic number.

It is not a de Polignac number, because 172308029 - 2¹⁶ = 172242493 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 172307986 and 172308004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172308023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86154014 + 86154015.

It is an arithmetic number, because the mean of its divisors is an integer number (86154015).

Almost surely, 2^172308029 is an apocalyptic number.

It is an amenable number.

172308029 is a deficient number, since it is larger than the sum of its proper divisors (1).

172308029 is an equidigital number, since it uses as much as digits as its factorization.

172308029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 172308029 is about 13126.6152910794. The cubic root of 172308029 is about 556.4615633569.

The spelling of 172308029 in words is "one hundred seventy-two million, three hundred eight thousand, twenty-nine".