172398823 has 8 divisors (see below), whose sum is σ = 186098400. Its totient is φ = 159216288.

The previous prime is 172398803. The next prime is 172398827. The reversal of 172398823 is 328893271.

172398823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 172398823 - 2⁹ = 172398311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172398823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172398827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128568 + ... + 129901.

It is an arithmetic number, because the mean of its divisors is an integer number (23262300).

Almost surely, 2^172398823 is an apocalyptic number.

172398823 is a deficient number, since it is larger than the sum of its proper divisors (13699577).

172398823 is a wasteful number, since it uses less digits than its factorization.

172398823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258521.

The product of its digits is 145152, while the sum is 43.

The square root of 172398823 is about 13130.0732290418. The cubic root of 172398823 is about 556.5592846684.

It can be divided in two parts, 17239 and 8823, that added together give a palindrome (26062).

The spelling of 172398823 in words is "one hundred seventy-two million, three hundred ninety-eight thousand, eight hundred twenty-three".