2138559279 has 8 divisors (see below), whose sum is σ = 2859183360. Its totient is φ = 1421820696.

The previous prime is 2138559277. The next prime is 2138559281. The reversal of 2138559279 is 9729558312.

It is an interprime number because it is at equal distance from previous prime (2138559277) and next prime (2138559281).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2138559279 - 2¹ = 2138559277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138559277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 970089 + ... + 972290.

It is an arithmetic number, because the mean of its divisors is an integer number (357397920).

Almost surely, 2^2138559279 is an apocalyptic number.

2138559279 is a deficient number, since it is larger than the sum of its proper divisors (720624081).

2138559279 is a wasteful number, since it uses less digits than its factorization.

2138559279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942749.

The product of its digits is 1360800, while the sum is 51.

The square root of 2138559279 is about 46244.5594529778. The cubic root of 2138559279 is about 1288.3694879456.

The spelling of 2138559279 in words is "two billion, one hundred thirty-eight million, five hundred fifty-nine thousand, two hundred seventy-nine".