172168459 has 2 divisors, whose sum is σ = 172168460. Its totient is φ = 172168458.

The previous prime is 172168441. The next prime is 172168463. The reversal of 172168459 is 954861271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172168459 - 2¹¹ = 172166411 is a prime.

It is not a weakly prime, because it can be changed into another prime (172168429) 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, 86084229 + 86084230.

It is an arithmetic number, because the mean of its divisors is an integer number (86084230).

Almost surely, 2^172168459 is an apocalyptic number.

172168459 is a deficient number, since it is larger than the sum of its proper divisors (1).

172168459 is an equidigital number, since it uses as much as digits as its factorization.

172168459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 172168459 is about 13121.2979159838. The cubic root of 172168459 is about 556.3112776157.

The spelling of 172168459 in words is "one hundred seventy-two million, one hundred sixty-eight thousand, four hundred fifty-nine".