13879997 has 2 divisors, whose sum is σ = 13879998. Its totient is φ = 13879996.

The previous prime is 13879979. The next prime is 13880023. The reversal of 13879997 is 79997831.

Together with previous prime (13879979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13205956 + 674041 = 3634^2 + 821^2 .

It is an emirp because it is prime and its reverse (79997831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13879997 - 2¹⁰ = 13878973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13879907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6939998 + 6939999.

It is an arithmetic number, because the mean of its divisors is an integer number (6939999).

Almost surely, 2^13879997 is an apocalyptic number.

It is an amenable number.

13879997 is a deficient number, since it is larger than the sum of its proper divisors (1).

13879997 is an equidigital number, since it uses as much as digits as its factorization.

13879997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 53.

The square root of 13879997 is about 3725.5867994183. The cubic root of 13879997 is about 240.3236201418.

The spelling of 13879997 in words is "thirteen million, eight hundred seventy-nine thousand, nine hundred ninety-seven".