172347313 has 4 divisors (see below), whose sum is σ = 176550948. Its totient is φ = 168143680.

The previous prime is 172347289. The next prime is 172347337. The reversal of 172347313 is 313743271.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (172347289) and next prime (172347337).

It can be written as a sum of positive squares in 2 ways, for example, as 79263409 + 93083904 = 8903^2 + 9648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172347313 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172347353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2101756 + ... + 2101837.

It is an arithmetic number, because the mean of its divisors is an integer number (44137737).

Almost surely, 2^172347313 is an apocalyptic number.

It is an amenable number.

172347313 is a deficient number, since it is larger than the sum of its proper divisors (4203635).

172347313 is an equidigital number, since it uses as much as digits as its factorization.

172347313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203634.

The product of its digits is 10584, while the sum is 31.

The square root of 172347313 is about 13128.1115549800. Note that the first 3 decimals coincide. The cubic root of 172347313 is about 556.5038488212.

The spelling of 172347313 in words is "one hundred seventy-two million, three hundred forty-seven thousand, three hundred thirteen".