2002172389 has 24 divisors (see below), whose sum is σ = 2370088728. Its totient is φ = 1686182400.

The previous prime is 2002172377. The next prime is 2002172477. The reversal of 2002172389 is 9832712002.

It can be written as a sum of positive squares in 4 ways, for example, as 1227941764 + 774230625 = 35042^2 + 27825^2 .

It is not a de Polignac number, because 2002172389 - 2⁵ = 2002172357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002172309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 676537 + ... + 679489.

It is an arithmetic number, because the mean of its divisors is an integer number (98753697).

Almost surely, 2^2002172389 is an apocalyptic number.

It is an amenable number.

2002172389 is a deficient number, since it is larger than the sum of its proper divisors (367916339).

2002172389 is a wasteful number, since it uses less digits than its factorization.

2002172389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205 (or 3198 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 2002172389 is about 44745.6410055773. The cubic root of 2002172389 is about 1260.3770579352.

The spelling of 2002172389 in words is "two billion, two million, one hundred seventy-two thousand, three hundred eighty-nine".