172818713 has 2 divisors, whose sum is σ = 172818714. Its totient is φ = 172818712.

The previous prime is 172818703. The next prime is 172818721. The reversal of 172818713 is 317818271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147938569 + 24880144 = 12163^2 + 4988^2 .

It is a cyclic number.

It is not a de Polignac number, because 172818713 - 2¹⁶ = 172753177 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_9651881 and since 172818713 and 9651881 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (172818703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86409356 + 86409357.

It is an arithmetic number, because the mean of its divisors is an integer number (86409357).

Almost surely, 2^172818713 is an apocalyptic number.

It is an amenable number.

172818713 is a deficient number, since it is larger than the sum of its proper divisors (1).

172818713 is an equidigital number, since it uses as much as digits as its factorization.

172818713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 38.

The square root of 172818713 is about 13146.0531339258. The cubic root of 172818713 is about 557.0107653383.

The spelling of 172818713 in words is "one hundred seventy-two million, eight hundred eighteen thousand, seven hundred thirteen".