172372999 has 2 divisors, whose sum is σ = 172373000. Its totient is φ = 172372998.

The previous prime is 172372961. The next prime is 172373009. The reversal of 172372999 is 999273271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172372999 - 2²⁵ = 138818567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172372919) 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, 86186499 + 86186500.

It is an arithmetic number, because the mean of its divisors is an integer number (86186500).

Almost surely, 2^172372999 is an apocalyptic number.

172372999 is a deficient number, since it is larger than the sum of its proper divisors (1).

172372999 is an equidigital number, since it uses as much as digits as its factorization.

172372999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 49.

The square root of 172372999 is about 13129.0898008963. The cubic root of 172372999 is about 556.5314938664.

It can be divided in two parts, 172372 and 999, that added together give a palindrome (173371).

The spelling of 172372999 in words is "one hundred seventy-two million, three hundred seventy-two thousand, nine hundred ninety-nine".