173172447 has 12 divisors (see below), whose sum is σ = 285872080. Its totient is φ = 98955648.

The previous prime is 173172443. The next prime is 173172449. The reversal of 173172447 is 744271371.

It is not a de Polignac number, because 173172447 - 2² = 173172443 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 (173172443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1374322 + ... + 1374447.

Almost surely, 2^173172447 is an apocalyptic number.

173172447 is a deficient number, since it is larger than the sum of its proper divisors (112699633).

173172447 is a wasteful number, since it uses less digits than its factorization.

173172447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748782 (or 2748779 counting only the distinct ones).

The product of its digits is 32928, while the sum is 36.

The square root of 173172447 is about 13159.5002564687. The cubic root of 173172447 is about 557.3905455186.

The spelling of 173172447 in words is "one hundred seventy-three million, one hundred seventy-two thousand, four hundred forty-seven".