13979138423 has 2 divisors, whose sum is σ = 13979138424. Its totient is φ = 13979138422.

The previous prime is 13979138377. The next prime is 13979138447. The reversal of 13979138423 is 32483197931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13979138423 - 2⁶ = 13979138359 is a prime.

It is a super-2 number, since 2×13979138423² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13979138483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6989569211 + 6989569212.

It is an arithmetic number, because the mean of its divisors is an integer number (6989569212).

Almost surely, 2^13979138423 is an apocalyptic number.

13979138423 is a deficient number, since it is larger than the sum of its proper divisors (1).

13979138423 is an equidigital number, since it uses as much as digits as its factorization.

13979138423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The spelling of 13979138423 in words is "thirteen billion, nine hundred seventy-nine million, one hundred thirty-eight thousand, four hundred twenty-three".