172044013 has 4 divisors (see below), whose sum is σ = 172345888. Its totient is φ = 171742140.

The previous prime is 172044011. The next prime is 172044073. The reversal of 172044013 is 310440271.

172044013 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310440271 = 277 ⋅1120723.

It is a cyclic number.

It is not a de Polignac number, because 172044013 - 2¹ = 172044011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172044011) 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, 150081 + ... + 151222.

It is an arithmetic number, because the mean of its divisors is an integer number (43086472).

Almost surely, 2^172044013 is an apocalyptic number.

It is an amenable number.

172044013 is a deficient number, since it is larger than the sum of its proper divisors (301875).

172044013 is an equidigital number, since it uses as much as digits as its factorization.

172044013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301874.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 172044013 is about 13116.5549211674. The cubic root of 172044013 is about 556.1772085365.

Adding to 172044013 its reverse (310440271), we get a palindrome (482484284).

The spelling of 172044013 in words is "one hundred seventy-two million, forty-four thousand, thirteen".