2138946311 has 2 divisors, whose sum is σ = 2138946312. Its totient is φ = 2138946310.

The previous prime is 2138946289. The next prime is 2138946331. The reversal of 2138946311 is 1136498312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2138946311 - 2⁶ = 2138946247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2138946331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069473155 + 1069473156.

It is an arithmetic number, because the mean of its divisors is an integer number (1069473156).

Almost surely, 2^2138946311 is an apocalyptic number.

2138946311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138946311 is an equidigital number, since it uses as much as digits as its factorization.

2138946311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 2138946311 is about 46248.7438856452. The cubic root of 2138946311 is about 1288.4472053987.

The spelling of 2138946311 in words is "two billion, one hundred thirty-eight million, nine hundred forty-six thousand, three hundred eleven".