173372645 has 4 divisors (see below), whose sum is σ = 208047180. Its totient is φ = 138698112.

The previous prime is 173372609. The next prime is 173372657. The reversal of 173372645 is 546273371.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546273371 = 7 ⋅78039053.

It can be written as a sum of positive squares in 2 ways, for example, as 20948929 + 152423716 = 4577^2 + 12346^2 .

It is a cyclic number.

It is not a de Polignac number, because 173372645 - 2⁸ = 173372389 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 173372599 and 173372608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17337260 + ... + 17337269.

It is an arithmetic number, because the mean of its divisors is an integer number (52011795).

Almost surely, 2^173372645 is an apocalyptic number.

It is an amenable number.

173372645 is a deficient number, since it is larger than the sum of its proper divisors (34674535).

173372645 is an equidigital number, since it uses as much as digits as its factorization.

173372645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34674534.

The product of its digits is 105840, while the sum is 38.

The square root of 173372645 is about 13167.1046551624. The cubic root of 173372645 is about 557.6052553852.

The spelling of 173372645 in words is "one hundred seventy-three million, three hundred seventy-two thousand, six hundred forty-five".