172557013 has 2 divisors, whose sum is σ = 172557014. Its totient is φ = 172557012.

The previous prime is 172556981. The next prime is 172557019. The reversal of 172557013 is 310755271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103367889 + 69189124 = 10167^2 + 8318^2 .

It is a cyclic number.

It is not a de Polignac number, because 172557013 - 2⁵ = 172556981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172557019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86278506 + 86278507.

It is an arithmetic number, because the mean of its divisors is an integer number (86278507).

Almost surely, 2^172557013 is an apocalyptic number.

It is an amenable number.

172557013 is a deficient number, since it is larger than the sum of its proper divisors (1).

172557013 is an equidigital number, since it uses as much as digits as its factorization.

172557013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 172557013 is about 13136.0958050709. The cubic root of 172557013 is about 556.7294621612.

The spelling of 172557013 in words is "one hundred seventy-two million, five hundred fifty-seven thousand, thirteen".