12886949 has 2 divisors, whose sum is σ = 12886950. Its totient is φ = 12886948.

The previous prime is 12886931. The next prime is 12886963. The reversal of 12886949 is 94968821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9672100 + 3214849 = 3110^2 + 1793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12886949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12886919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6443474 + 6443475.

It is an arithmetic number, because the mean of its divisors is an integer number (6443475).

Almost surely, 2^12886949 is an apocalyptic number.

It is an amenable number.

12886949 is a deficient number, since it is larger than the sum of its proper divisors (1).

12886949 is an equidigital number, since it uses as much as digits as its factorization.

12886949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 47.

The square root of 12886949 is about 3589.8396900140. The cubic root of 12886949 is about 234.4498917763.

The spelling of 12886949 in words is "twelve million, eight hundred eighty-six thousand, nine hundred forty-nine".