2139849013 has 4 divisors (see below), whose sum is σ = 2213636940. Its totient is φ = 2066061088.

The previous prime is 2139848969. The next prime is 2139849029. The reversal of 2139849013 is 3109489312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 707453604 + 1432395409 = 26598^2 + 37847^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139849013 - 2¹³ = 2139840821 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 (2139849043) 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, 36893920 + ... + 36893977.

It is an arithmetic number, because the mean of its divisors is an integer number (553409235).

Almost surely, 2^2139849013 is an apocalyptic number.

It is an amenable number.

2139849013 is a deficient number, since it is larger than the sum of its proper divisors (73787927).

2139849013 is an equidigital number, since it uses as much as digits as its factorization.

2139849013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73787926.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 2139849013 is about 46258.5020617832. The cubic root of 2139849013 is about 1288.6284348640.

The spelling of 2139849013 in words is "two billion, one hundred thirty-nine million, eight hundred forty-nine thousand, thirteen".