2139705863 has 2 divisors, whose sum is σ = 2139705864. Its totient is φ = 2139705862.

The previous prime is 2139705853. The next prime is 2139705941. The reversal of 2139705863 is 3685079312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2139705863 - 2²⁸ = 1871270407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2139705853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069852931 + 1069852932.

It is an arithmetic number, because the mean of its divisors is an integer number (1069852932).

Almost surely, 2^2139705863 is an apocalyptic number.

2139705863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139705863 is an equidigital number, since it uses as much as digits as its factorization.

2139705863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 2139705863 is about 46256.9547527720. The cubic root of 2139705863 is about 1288.5996989932.

The spelling of 2139705863 in words is "two billion, one hundred thirty-nine million, seven hundred five thousand, eight hundred sixty-three".