172046317 has 2 divisors, whose sum is σ = 172046318. Its totient is φ = 172046316.

The previous prime is 172046257. The next prime is 172046339. The reversal of 172046317 is 713640271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111112681 + 60933636 = 10541^2 + 7806^2 .

It is a cyclic number.

It is not a de Polignac number, because 172046317 - 2²⁷ = 37828589 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 (172046617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86023158 + 86023159.

It is an arithmetic number, because the mean of its divisors is an integer number (86023159).

Almost surely, 2^172046317 is an apocalyptic number.

It is an amenable number.

172046317 is a deficient number, since it is larger than the sum of its proper divisors (1).

172046317 is an equidigital number, since it uses as much as digits as its factorization.

172046317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 172046317 is about 13116.6427488134. The cubic root of 172046317 is about 556.1796912861.

Adding to 172046317 its reverse (713640271), we get a palindrome (885686588).

The spelling of 172046317 in words is "one hundred seventy-two million, forty-six thousand, three hundred seventeen".