2139365863 has 4 divisors (see below), whose sum is σ = 2197186600. Its totient is φ = 2081545128.

The previous prime is 2139365849. The next prime is 2139365897. The reversal of 2139365863 is 3685639312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2139365863 - 2¹⁷ = 2139234791 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 (2139365803) 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 3 ways as a sum of consecutive naturals, for example, 28910313 + ... + 28910386.

It is an arithmetic number, because the mean of its divisors is an integer number (549296650).

Almost surely, 2^2139365863 is an apocalyptic number.

2139365863 is a deficient number, since it is larger than the sum of its proper divisors (57820737).

2139365863 is an equidigital number, since it uses as much as digits as its factorization.

2139365863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57820736.

The product of its digits is 699840, while the sum is 46.

The square root of 2139365863 is about 46253.2794837296. The cubic root of 2139365863 is about 1288.5314423988.

The spelling of 2139365863 in words is "two billion, one hundred thirty-nine million, three hundred sixty-five thousand, eight hundred sixty-three".