172745223 has 8 divisors (see below), whose sum is σ = 263230848. Its totient is φ = 98711544.

The previous prime is 172745219. The next prime is 172745269. The reversal of 172745223 is 322547271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172745223 - 2² = 172745219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172745323) 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 7 ways as a sum of consecutive naturals, for example, 4112961 + ... + 4113002.

It is an arithmetic number, because the mean of its divisors is an integer number (32903856).

Almost surely, 2^172745223 is an apocalyptic number.

172745223 is a deficient number, since it is larger than the sum of its proper divisors (90485625).

172745223 is an equidigital number, since it uses as much as digits as its factorization.

172745223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8225973.

The product of its digits is 23520, while the sum is 33.

The square root of 172745223 is about 13143.2577011942. The cubic root of 172745223 is about 556.9317991118.

The spelling of 172745223 in words is "one hundred seventy-two million, seven hundred forty-five thousand, two hundred twenty-three".