2125868939 has 2 divisors, whose sum is σ = 2125868940. Its totient is φ = 2125868938.

The previous prime is 2125868923. The next prime is 2125868947. The reversal of 2125868939 is 9398685212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2125868939 - 2⁴ = 2125868923 is a prime.

It is not a weakly prime, because it can be changed into another prime (2125868999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062934469 + 1062934470.

It is an arithmetic number, because the mean of its divisors is an integer number (1062934470).

Almost surely, 2^2125868939 is an apocalyptic number.

2125868939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125868939 is an equidigital number, since it uses as much as digits as its factorization.

2125868939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 53.

The square root of 2125868939 is about 46107.1462899191. The cubic root of 2125868939 is about 1285.8160096335.

The spelling of 2125868939 in words is "two billion, one hundred twenty-five million, eight hundred sixty-eight thousand, nine hundred thirty-nine".