172864345 has 4 divisors (see below), whose sum is σ = 207437220. Its totient is φ = 138291472.

The previous prime is 172864327. The next prime is 172864357. The reversal of 172864345 is 543468271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543468271 = 43 ⋅12638797.

It can be written as a sum of positive squares in 2 ways, for example, as 60419529 + 112444816 = 7773^2 + 10604^2 .

It is a cyclic number.

It is not a de Polignac number, because 172864345 - 2¹⁹ = 172340057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172864298 and 172864307.

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, 17286430 + ... + 17286439.

It is an arithmetic number, because the mean of its divisors is an integer number (51859305).

Almost surely, 2^172864345 is an apocalyptic number.

It is an amenable number.

172864345 is a deficient number, since it is larger than the sum of its proper divisors (34572875).

172864345 is an equidigital number, since it uses as much as digits as its factorization.

172864345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34572874.

The product of its digits is 161280, while the sum is 40.

The square root of 172864345 is about 13147.7885973269. The cubic root of 172864345 is about 557.0597864156.

The spelling of 172864345 in words is "one hundred seventy-two million, eight hundred sixty-four thousand, three hundred forty-five".