2139706899 has 18 divisors (see below), whose sum is σ = 3372384756. Its totient is φ = 1296513120.

The previous prime is 2139706889. The next prime is 2139706909. The reversal of 2139706899 is 9986079312.

It is an interprime number because it is at equal distance from previous prime (2139706889) and next prime (2139706909).

It is not a de Polignac number, because 2139706899 - 2⁷ = 2139706771 is a prime.

It is a super-2 number, since 2×2139706899² = 9156691227256392402, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2139706879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 457927 + ... + 462575.

Almost surely, 2^2139706899 is an apocalyptic number.

2139706899 is a deficient number, since it is larger than the sum of its proper divisors (1232677857).

2139706899 is an frugal number, since it uses more digits than its factorization.

2139706899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9315 (or 4663 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 2139706899 is about 46256.9659510868. The cubic root of 2139706899 is about 1288.5999069640.

The spelling of 2139706899 in words is "two billion, one hundred thirty-nine million, seven hundred six thousand, eight hundred ninety-nine".