172660613 has 4 divisors (see below), whose sum is σ = 173111808. Its totient is φ = 172209420.

The previous prime is 172660601. The next prime is 172660627. The reversal of 172660613 is 316066271.

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 a cyclic number.

It is not a de Polignac number, because 172660613 - 2¹⁸ = 172398469 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 172660613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172660633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225023 + ... + 225788.

It is an arithmetic number, because the mean of its divisors is an integer number (43277952).

Almost surely, 2^172660613 is an apocalyptic number.

It is an amenable number.

172660613 is a deficient number, since it is larger than the sum of its proper divisors (451195).

172660613 is an equidigital number, since it uses as much as digits as its factorization.

172660613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451194.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 172660613 is about 13140.0385463666. The cubic root of 172660613 is about 556.8408565198.

The spelling of 172660613 in words is "one hundred seventy-two million, six hundred sixty thousand, six hundred thirteen".