13893779 has 2 divisors, whose sum is σ = 13893780. Its totient is φ = 13893778.

The previous prime is 13893751. The next prime is 13893799. The reversal of 13893779 is 97739831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13893779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13893739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6946889 + 6946890.

It is an arithmetic number, because the mean of its divisors is an integer number (6946890).

Almost surely, 2^13893779 is an apocalyptic number.

13893779 is a deficient number, since it is larger than the sum of its proper divisors (1).

13893779 is an equidigital number, since it uses as much as digits as its factorization.

13893779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 47.

The square root of 13893779 is about 3727.4359820123. The cubic root of 13893779 is about 240.4031361169.

The spelling of 13893779 in words is "thirteen million, eight hundred ninety-three thousand, seven hundred seventy-nine".