172446147389 has 4 divisors (see below), whose sum is σ = 172483133856. Its totient is φ = 172409160924.

The previous prime is 172446147383. The next prime is 172446147397. The reversal of 172446147389 is 983741644271.

172446147389 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: 983741644271 = 7759 ⋅126787169.

It is a cyclic number.

It is not a de Polignac number, because 172446147389 - 2²⁴ = 172429370173 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 (172446147383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18486239 + ... + 18495564.

It is an arithmetic number, because the mean of its divisors is an integer number (43120783464).

Almost surely, 2^172446147389 is an apocalyptic number.

It is an amenable number.

172446147389 is a deficient number, since it is larger than the sum of its proper divisors (36986467).

172446147389 is an equidigital number, since it uses as much as digits as its factorization.

172446147389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36986466.

The product of its digits is 8128512, while the sum is 56.

The spelling of 172446147389 in words is "one hundred seventy-two billion, four hundred forty-six million, one hundred forty-seven thousand, three hundred eighty-nine".