12817859 has 2 divisors, whose sum is σ = 12817860. Its totient is φ = 12817858.

The previous prime is 12817853. The next prime is 12817867. The reversal of 12817859 is 95871821.

12817859 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12817859 is a prime.

It is not a weakly prime, because it can be changed into another prime (12817853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6408929 + 6408930.

It is an arithmetic number, because the mean of its divisors is an integer number (6408930).

Almost surely, 2^12817859 is an apocalyptic number.

12817859 is a deficient number, since it is larger than the sum of its proper divisors (1).

12817859 is an equidigital number, since it uses as much as digits as its factorization.

12817859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 41.

The square root of 12817859 is about 3580.2037651508. The cubic root of 12817859 is about 234.0301602345.

The spelling of 12817859 in words is "twelve million, eight hundred seventeen thousand, eight hundred fifty-nine".