172724701 has 2 divisors, whose sum is σ = 172724702. Its totient is φ = 172724700.

The previous prime is 172724693. The next prime is 172724707. The reversal of 172724701 is 107427271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103002201 + 69722500 = 10149^2 + 8350^2 .

It is a cyclic number.

It is not a de Polignac number, because 172724701 - 2³ = 172724693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172724707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86362350 + 86362351.

It is an arithmetic number, because the mean of its divisors is an integer number (86362351).

Almost surely, 2^172724701 is an apocalyptic number.

It is an amenable number.

172724701 is a deficient number, since it is larger than the sum of its proper divisors (1).

172724701 is an equidigital number, since it uses as much as digits as its factorization.

172724701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5488, while the sum is 31.

The square root of 172724701 is about 13142.4769735389. The cubic root of 172724701 is about 556.9097438815.

The spelling of 172724701 in words is "one hundred seventy-two million, seven hundred twenty-four thousand, seven hundred one".