12649913 has 2 divisors, whose sum is σ = 12649914. Its totient is φ = 12649912.

The previous prime is 12649907. The next prime is 12649919. The reversal of 12649913 is 31994621.

It is a balanced prime because it is at equal distance from previous prime (12649907) and next prime (12649919).

It can be written as a sum of positive squares in only one way, i.e., 11854249 + 795664 = 3443^2 + 892^2 .

It is a cyclic number.

It is not a de Polignac number, because 12649913 - 2¹⁸ = 12387769 is a prime.

It is not a weakly prime, because it can be changed into another prime (12649919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6324956 + 6324957.

It is an arithmetic number, because the mean of its divisors is an integer number (6324957).

Almost surely, 2^12649913 is an apocalyptic number.

It is an amenable number.

12649913 is a deficient number, since it is larger than the sum of its proper divisors (1).

12649913 is an equidigital number, since it uses as much as digits as its factorization.

12649913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 12649913 is about 3556.6716182409. The cubic root of 12649913 is about 233.0035365744.

It can be divided in two parts, 1264991 and 3, that multiplied together give a palindrome (3794973).

The spelling of 12649913 in words is "twelve million, six hundred forty-nine thousand, nine hundred thirteen".