138283679 has 2 divisors, whose sum is σ = 138283680. Its totient is φ = 138283678.

The previous prime is 138283667. The next prime is 138283709. The reversal of 138283679 is 976382831.

138283679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (976382831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138283679 - 2²⁰ = 137235103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138283609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69141839 + 69141840.

It is an arithmetic number, because the mean of its divisors is an integer number (69141840).

Almost surely, 2^138283679 is an apocalyptic number.

138283679 is a deficient number, since it is larger than the sum of its proper divisors (1).

138283679 is an equidigital number, since it uses as much as digits as its factorization.

138283679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 138283679 is about 11759.4081058529. The cubic root of 138283679 is about 517.1187779476.

The spelling of 138283679 in words is "one hundred thirty-eight million, two hundred eighty-three thousand, six hundred seventy-nine".