12649993 has 2 divisors, whose sum is σ = 12649994. Its totient is φ = 12649992.

The previous prime is 12649979. The next prime is 12650021. The reversal of 12649993 is 39994621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8952064 + 3697929 = 2992^2 + 1923^2 .

It is a cyclic number.

It is not a de Polignac number, because 12649993 - 2¹³ = 12641801 is a prime.

It is not a weakly prime, because it can be changed into another prime (12649913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6324996 + 6324997.

It is an arithmetic number, because the mean of its divisors is an integer number (6324997).

Almost surely, 2^12649993 is an apocalyptic number.

It is an amenable number.

12649993 is a deficient number, since it is larger than the sum of its proper divisors (1).

12649993 is an equidigital number, since it uses as much as digits as its factorization.

12649993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 43.

The square root of 12649993 is about 3556.6828646929. The cubic root of 12649993 is about 233.0040277568.

The spelling of 12649993 in words is "twelve million, six hundred forty-nine thousand, nine hundred ninety-three".