13856993 has 2 divisors, whose sum is σ = 13856994. Its totient is φ = 13856992.

The previous prime is 13856987. The next prime is 13857001. The reversal of 13856993 is 39965831.

13856993 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 can be written as a sum of positive squares in only one way, i.e., 12902464 + 954529 = 3592^2 + 977^2 .

It is a cyclic number.

It is not a de Polignac number, because 13856993 - 2⁶ = 13856929 is a prime.

It is not a weakly prime, because it can be changed into another prime (13856923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6928496 + 6928497.

It is an arithmetic number, because the mean of its divisors is an integer number (6928497).

Almost surely, 2^13856993 is an apocalyptic number.

It is an amenable number.

13856993 is a deficient number, since it is larger than the sum of its proper divisors (1).

13856993 is an equidigital number, since it uses as much as digits as its factorization.

13856993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The square root of 13856993 is about 3722.4982202816. The cubic root of 13856993 is about 240.1907800185.

The spelling of 13856993 in words is "thirteen million, eight hundred fifty-six thousand, nine hundred ninety-three".