2055706139 has 4 divisors (see below), whose sum is σ = 2056796280. Its totient is φ = 2054616000.

The previous prime is 2055706129. The next prime is 2055706189. The reversal of 2055706139 is 9316075502.

It is a happy number.

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 2055706139 - 2⁴ = 2055706123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2055706129) 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, 542237 + ... + 546014.

It is an arithmetic number, because the mean of its divisors is an integer number (514199070).

Almost surely, 2^2055706139 is an apocalyptic number.

2055706139 is a deficient number, since it is larger than the sum of its proper divisors (1090141).

2055706139 is a wasteful number, since it uses less digits than its factorization.

2055706139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090140.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 2055706139 is about 45339.8956659585. The cubic root of 2055706139 is about 1271.5116517554.

The spelling of 2055706139 in words is "two billion, fifty-five million, seven hundred six thousand, one hundred thirty-nine".