2139705941 has 2 divisors, whose sum is σ = 2139705942. Its totient is φ = 2139705940.

The previous prime is 2139705863. The next prime is 2139705943. The reversal of 2139705941 is 1495079312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1940754916 + 198951025 = 44054^2 + 14105^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139705941 - 2²⁶ = 2072597077 is a prime.

Together with 2139705943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2139705943) 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 as a sum of consecutive naturals, namely, 1069852970 + 1069852971.

It is an arithmetic number, because the mean of its divisors is an integer number (1069852971).

Almost surely, 2^2139705941 is an apocalyptic number.

It is an amenable number.

2139705941 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139705941 is an equidigital number, since it uses as much as digits as its factorization.

2139705941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 2139705941 is about 46256.9555958885. The cubic root of 2139705941 is about 1288.5997146512.

The spelling of 2139705941 in words is "two billion, one hundred thirty-nine million, seven hundred five thousand, nine hundred forty-one".