12949639 has 2 divisors, whose sum is σ = 12949640. Its totient is φ = 12949638.

The previous prime is 12949627. The next prime is 12949679. The reversal of 12949639 is 93694921.

It is a weak prime.

It is an emirp because it is prime and its reverse (93694921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12949639 - 2⁷ = 12949511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12949595 and 12949604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12949679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6474819 + 6474820.

It is an arithmetic number, because the mean of its divisors is an integer number (6474820).

Almost surely, 2^12949639 is an apocalyptic number.

12949639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12949639 is an equidigital number, since it uses as much as digits as its factorization.

12949639 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 12949639 is about 3598.5606844960. The cubic root of 12949639 is about 234.8294461898.

The spelling of 12949639 in words is "twelve million, nine hundred forty-nine thousand, six hundred thirty-nine".