1138135679 has 2 divisors, whose sum is σ = 1138135680. Its totient is φ = 1138135678.

The previous prime is 1138135673. The next prime is 1138135681. The reversal of 1138135679 is 9765318311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1138135679 - 2²⁰ = 1137087103 is a prime.

Together with 1138135681, 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 (1138135673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569067839 + 569067840.

It is an arithmetic number, because the mean of its divisors is an integer number (569067840).

Almost surely, 2^1138135679 is an apocalyptic number.

1138135679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138135679 is an equidigital number, since it uses as much as digits as its factorization.

1138135679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 1138135679 is about 33736.2665243207. The cubic root of 1138135679 is about 1044.0741565793.

The spelling of 1138135679 in words is "one billion, one hundred thirty-eight million, one hundred thirty-five thousand, six hundred seventy-nine".