3721872159 has 20 divisors (see below), whose sum is σ = 5664742776. Its totient is φ = 2434429296.

The previous prime is 3721872157. The next prime is 3721872179. The reversal of 3721872159 is 9512781273.

It is not a de Polignac number, because 3721872159 - 2¹ = 3721872157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721872157) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 429189 + ... + 437774.

Almost surely, 2^3721872159 is an apocalyptic number.

3721872159 is a deficient number, since it is larger than the sum of its proper divisors (1942870617).

3721872159 is an equidigital number, since it uses as much as digits as its factorization.

3721872159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867028 (or 867019 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 3721872159 is about 61007.1484254100. The cubic root of 3721872159 is about 1549.7220672667.

The spelling of 3721872159 in words is "three billion, seven hundred twenty-one million, eight hundred seventy-two thousand, one hundred fifty-nine".