12986863 has 2 divisors, whose sum is σ = 12986864. Its totient is φ = 12986862.

The previous prime is 12986849. The next prime is 12986879. The reversal of 12986863 is 36868921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12986863 is a prime.

It is a super-2 number, since 2×12986863² = 337317221161538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12986833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6493431 + 6493432.

It is an arithmetic number, because the mean of its divisors is an integer number (6493432).

Almost surely, 2^12986863 is an apocalyptic number.

12986863 is a deficient number, since it is larger than the sum of its proper divisors (1).

12986863 is an equidigital number, since it uses as much as digits as its factorization.

12986863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 12986863 is about 3603.7290408686. The cubic root of 12986863 is about 235.0542382730.

The spelling of 12986863 in words is "twelve million, nine hundred eighty-six thousand, eight hundred sixty-three".