138394758919 has 2 divisors, whose sum is σ = 138394758920. Its totient is φ = 138394758918.

The previous prime is 138394758911. The next prime is 138394758923. The reversal of 138394758919 is 919857493831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138394758919 - 2³ = 138394758911 is a prime.

It is a super-2 number, since 2×138394758919² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138394758911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69197379459 + 69197379460.

It is an arithmetic number, because the mean of its divisors is an integer number (69197379460).

Almost surely, 2^138394758919 is an apocalyptic number.

138394758919 is a deficient number, since it is larger than the sum of its proper divisors (1).

138394758919 is an equidigital number, since it uses as much as digits as its factorization.

138394758919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 67.

The spelling of 138394758919 in words is "one hundred thirty-eight billion, three hundred ninety-four million, seven hundred fifty-eight thousand, nine hundred nineteen".