172730345 has 16 divisors (see below), whose sum is σ = 219843072. Its totient is φ = 130004160.

The previous prime is 172730323. The next prime is 172730359. The reversal of 172730345 is 543037271.

It is a de Polignac number, because none of the positive numbers 2^k-172730345 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5297 + ... + 19326.

It is an arithmetic number, because the mean of its divisors is an integer number (13740192).

Almost surely, 2^172730345 is an apocalyptic number.

It is an amenable number.

172730345 is a deficient number, since it is larger than the sum of its proper divisors (47112727).

172730345 is a wasteful number, since it uses less digits than its factorization.

172730345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24712.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 172730345 is about 13142.6916953872. The cubic root of 172730345 is about 556.9158097276.

The spelling of 172730345 in words is "one hundred seventy-two million, seven hundred thirty thousand, three hundred forty-five".