2173724039 has 4 divisors (see below), whose sum is σ = 2173817880. Its totient is φ = 2173630200.

The previous prime is 2173724027. The next prime is 2173724041. The reversal of 2173724039 is 9304273712.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2173724039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2173723993 and 2173724011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173724099) 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, 15557 + ... + 67745.

It is an arithmetic number, because the mean of its divisors is an integer number (543454470).

Almost surely, 2^2173724039 is an apocalyptic number.

2173724039 is a deficient number, since it is larger than the sum of its proper divisors (93841).

2173724039 is an equidigital number, since it uses as much as digits as its factorization.

2173724039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93840.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 2173724039 is about 46623.2135207345. The cubic root of 2173724039 is about 1295.3927718433.

The spelling of 2173724039 in words is "two billion, one hundred seventy-three million, seven hundred twenty-four thousand, thirty-nine".