172475823 has 24 divisors (see below), whose sum is σ = 251383440. Its totient is φ = 105131520.

The previous prime is 172475819. The next prime is 172475837. The reversal of 172475823 is 328574271.

It is not a de Polignac number, because 172475823 - 2² = 172475819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172475803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53703 + ... + 56823.

It is an arithmetic number, because the mean of its divisors is an integer number (10474310).

Almost surely, 2^172475823 is an apocalyptic number.

172475823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

172475823 is a deficient number, since it is larger than the sum of its proper divisors (78907617).

172475823 is a wasteful number, since it uses less digits than its factorization.

172475823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259 (or 3246 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 172475823 is about 13133.0051016513. The cubic root of 172475823 is about 556.6421326552.

The spelling of 172475823 in words is "one hundred seventy-two million, four hundred seventy-five thousand, eight hundred twenty-three".