12649529 has 2 divisors, whose sum is σ = 12649530. Its totient is φ = 12649528.

The previous prime is 12649499. The next prime is 12649531. The reversal of 12649529 is 92594621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8133904 + 4515625 = 2852^2 + 2125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12649529 is a prime.

Together with 12649531, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12649492 and 12649501.

It is not a weakly prime, because it can be changed into another prime (12649589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6324764 + 6324765.

It is an arithmetic number, because the mean of its divisors is an integer number (6324765).

Almost surely, 2^12649529 is an apocalyptic number.

It is an amenable number.

12649529 is a deficient number, since it is larger than the sum of its proper divisors (1).

12649529 is an equidigital number, since it uses as much as digits as its factorization.

12649529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 12649529 is about 3556.6176347761. The cubic root of 12649529 is about 233.0011788701.

The spelling of 12649529 in words is "twelve million, six hundred forty-nine thousand, five hundred twenty-nine".