13856413 has 2 divisors, whose sum is σ = 13856414. Its totient is φ = 13856412.

The previous prime is 13856369. The next prime is 13856441. The reversal of 13856413 is 31465831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10478169 + 3378244 = 3237^2 + 1838^2 .

It is an emirp because it is prime and its reverse (31465831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13856413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13836413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6928206 + 6928207.

It is an arithmetic number, because the mean of its divisors is an integer number (6928207).

Almost surely, 2^13856413 is an apocalyptic number.

It is an amenable number.

13856413 is a deficient number, since it is larger than the sum of its proper divisors (1).

13856413 is an equidigital number, since it uses as much as digits as its factorization.

13856413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 13856413 is about 3722.4203147952. The cubic root of 13856413 is about 240.1874288202.

The spelling of 13856413 in words is "thirteen million, eight hundred fifty-six thousand, four hundred thirteen".