172613 has 4 divisors (see below), whose sum is σ = 197280. Its totient is φ = 147948.

The previous prime is 172607. The next prime is 172619. The reversal of 172613 is 316271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (172607) and next prime (172619).

It is a cyclic number.

It is not a de Polignac number, because 172613 - 2⁴ = 172597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12323 + ... + 12336.

It is an arithmetic number, because the mean of its divisors is an integer number (49320).

2¹⁷²⁶¹³ is an apocalyptic number.

It is an amenable number.

172613 is a deficient number, since it is larger than the sum of its proper divisors (24667).

172613 is an equidigital number, since it uses as much as digits as its factorization.

172613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24666.

The product of its digits is 252, while the sum is 20.

The square root of 172613 is about 415.4672068888. The cubic root of 172613 is about 55.6789666885.

Adding to 172613 its reverse (316271), we get a palindrome (488884).

The spelling of 172613 in words is "one hundred seventy-two thousand, six hundred thirteen".