12563209 has 2 divisors, whose sum is σ = 12563210. Its totient is φ = 12563208.

The previous prime is 12563207. The next prime is 12563249. The reversal of 12563209 is 90236521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11923209 + 640000 = 3453^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 12563209 - 2¹ = 12563207 is a prime.

Together with 12563207, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12563203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6281604 + 6281605.

It is an arithmetic number, because the mean of its divisors is an integer number (6281605).

Almost surely, 2^12563209 is an apocalyptic number.

It is an amenable number.

12563209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12563209 is an equidigital number, since it uses as much as digits as its factorization.

12563209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 12563209 is about 3544.4617362866. The cubic root of 12563209 is about 232.4699710707.

It can be divided in two parts, 1256 and 3209, that added together give a triangular number (4465 = T₉₄).

The spelling of 12563209 in words is "twelve million, five hundred sixty-three thousand, two hundred nine".