173472509 has 8 divisors (see below), whose sum is σ = 206874240. Its totient is φ = 142225776.

The previous prime is 173472421. The next prime is 173472521. The reversal of 173472509 is 905274371.

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

It is not a de Polignac number, because 173472509 - 2²⁴ = 156695293 is a prime.

It is a super-2 number, since 2×173472509² = 60185422757510162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173472589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538574 + ... + 538895.

It is an arithmetic number, because the mean of its divisors is an integer number (25859280).

Almost surely, 2^173472509 is an apocalyptic number.

It is an amenable number.

173472509 is a deficient number, since it is larger than the sum of its proper divisors (33401731).

173472509 is a wasteful number, since it uses less digits than its factorization.

173472509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077499.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 173472509 is about 13170.8962868895. The cubic root of 173472509 is about 557.7122964990.

The spelling of 173472509 in words is "one hundred seventy-three million, four hundred seventy-two thousand, five hundred nine".