172273999 has 4 divisors (see below), whose sum is σ = 172330120. Its totient is φ = 172217880.

The previous prime is 172273993. The next prime is 172274017. The reversal of 172273999 is 999372271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172273999 - 2³ = 172273991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172273991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23172 + ... + 29689.

It is an arithmetic number, because the mean of its divisors is an integer number (43082530).

Almost surely, 2^172273999 is an apocalyptic number.

172273999 is a deficient number, since it is larger than the sum of its proper divisors (56121).

172273999 is an equidigital number, since it uses as much as digits as its factorization.

172273999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56120.

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

The square root of 172273999 is about 13125.3190056471. The cubic root of 172273999 is about 556.4249281251.

The spelling of 172273999 in words is "one hundred seventy-two million, two hundred seventy-three thousand, nine hundred ninety-nine".