172857907 has 2 divisors, whose sum is σ = 172857908. Its totient is φ = 172857906.

The previous prime is 172857899. The next prime is 172857913. The reversal of 172857907 is 709758271.

172857907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172857907 - 2³ = 172857899 is a prime.

It is not a weakly prime, because it can be changed into another prime (172857947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86428953 + 86428954.

It is an arithmetic number, because the mean of its divisors is an integer number (86428954).

Almost surely, 2^172857907 is an apocalyptic number.

172857907 is a deficient number, since it is larger than the sum of its proper divisors (1).

172857907 is an equidigital number, since it uses as much as digits as its factorization.

172857907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246960, while the sum is 46.

The square root of 172857907 is about 13147.5437630000. The cubic root of 172857907 is about 557.0528707897.

The spelling of 172857907 in words is "one hundred seventy-two million, eight hundred fifty-seven thousand, nine hundred seven".