12649613 has 2 divisors, whose sum is σ = 12649614. Its totient is φ = 12649612.

The previous prime is 12649601. The next prime is 12649619. The reversal of 12649613 is 31694621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9597604 + 3052009 = 3098^2 + 1747^2 .

12649613 is a truncatable prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12649613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12649613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12649619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6324806 + 6324807.

It is an arithmetic number, because the mean of its divisors is an integer number (6324807).

Almost surely, 2^12649613 is an apocalyptic number.

It is an amenable number.

12649613 is a deficient number, since it is larger than the sum of its proper divisors (1).

12649613 is an equidigital number, since it uses as much as digits as its factorization.

12649613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 12649613 is about 3556.6294437290. The cubic root of 12649613 is about 233.0016946219.

The spelling of 12649613 in words is "twelve million, six hundred forty-nine thousand, six hundred thirteen".