172968613 has 4 divisors (see below), whose sum is σ = 173014380. Its totient is φ = 172922848.

The previous prime is 172968581. The next prime is 172968617. The reversal of 172968613 is 316869271.

172968613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 131262849 + 41705764 = 11457^2 + 6458^2 .

It is a cyclic number.

It is not a de Polignac number, because 172968613 - 2⁵ = 172968581 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172968613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172968617) 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, 16648 + ... + 24961.

It is an arithmetic number, because the mean of its divisors is an integer number (43253595).

Almost surely, 2^172968613 is an apocalyptic number.

It is an amenable number.

172968613 is a deficient number, since it is larger than the sum of its proper divisors (45767).

172968613 is an equidigital number, since it uses as much as digits as its factorization.

172968613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45766.

The product of its digits is 108864, while the sum is 43.

The square root of 172968613 is about 13151.7532291326. The cubic root of 172968613 is about 557.1717660057.

The spelling of 172968613 in words is "one hundred seventy-two million, nine hundred sixty-eight thousand, six hundred thirteen".