172420710167 has 2 divisors, whose sum is σ = 172420710168. Its totient is φ = 172420710166.

The previous prime is 172420710157. The next prime is 172420710179. The reversal of 172420710167 is 761017024271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172420710167 - 2²² = 172416515863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172420710167.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172420710127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86210355083 + 86210355084.

It is an arithmetic number, because the mean of its divisors is an integer number (86210355084).

Almost surely, 2^172420710167 is an apocalyptic number.

172420710167 is a deficient number, since it is larger than the sum of its proper divisors (1).

172420710167 is an equidigital number, since it uses as much as digits as its factorization.

172420710167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 38.

The spelling of 172420710167 in words is "one hundred seventy-two billion, four hundred twenty million, seven hundred ten thousand, one hundred sixty-seven".