173145730 has 8 divisors (see below), whose sum is σ = 311662332. Its totient is φ = 69258288.

The previous prime is 173145677. The next prime is 173145743. The reversal of 173145730 is 37541371.

173145730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 163405089 + 9740641 = 12783^2 + 3121^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 173145692 and 173145701.

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, 8657277 + ... + 8657296.

Almost surely, 2^173145730 is an apocalyptic number.

173145730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

173145730 is a deficient number, since it is larger than the sum of its proper divisors (138516602).

173145730 is a wasteful number, since it uses less digits than its factorization.

173145730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17314580.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 173145730 is about 13158.4850951772. The cubic root of 173145730 is about 557.3618793550.

The spelling of 173145730 in words is "one hundred seventy-three million, one hundred forty-five thousand, seven hundred thirty".