2143915139 has 2 divisors, whose sum is σ = 2143915140. Its totient is φ = 2143915138.

The previous prime is 2143915121. The next prime is 2143915153. The reversal of 2143915139 is 9315193412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143915139 is a prime.

It is not a weakly prime, because it can be changed into another prime (2143914139) 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, 1071957569 + 1071957570.

It is an arithmetic number, because the mean of its divisors is an integer number (1071957570).

Almost surely, 2^2143915139 is an apocalyptic number.

2143915139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143915139 is an equidigital number, since it uses as much as digits as its factorization.

2143915139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 38.

The square root of 2143915139 is about 46302.4312428624. The cubic root of 2143915139 is about 1289.4441326415. Note that the first 3 decimals are identical.

The spelling of 2143915139 in words is "two billion, one hundred forty-three million, nine hundred fifteen thousand, one hundred thirty-nine".