172273923 has 36 divisors (see below), whose sum is σ = 260724360. Its totient is φ = 109578240.

The previous prime is 172273921. The next prime is 172273963. The reversal of 172273923 is 329372271.

It is not a de Polignac number, because 172273923 - 2¹ = 172273921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172273921) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 892515 + ... + 892707.

Almost surely, 2^172273923 is an apocalyptic number.

172273923 is a deficient number, since it is larger than the sum of its proper divisors (88450437).

172273923 is a wasteful number, since it uses less digits than its factorization.

172273923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 296 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 172273923 is about 13125.3161104790. The cubic root of 172273923 is about 556.4248463014.

The spelling of 172273923 in words is "one hundred seventy-two million, two hundred seventy-three thousand, nine hundred twenty-three".