12975779 has 2 divisors, whose sum is σ = 12975780. Its totient is φ = 12975778.

The previous prime is 12975769. The next prime is 12975791. The reversal of 12975779 is 97757921.

It is a weak prime.

It is an emirp because it is prime and its reverse (97757921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12975779 - 2¹² = 12971683 is a prime.

It is not a weakly prime, because it can be changed into another prime (12975719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6487889 + 6487890.

It is an arithmetic number, because the mean of its divisors is an integer number (6487890).

Almost surely, 2^12975779 is an apocalyptic number.

12975779 is a deficient number, since it is larger than the sum of its proper divisors (1).

12975779 is an equidigital number, since it uses as much as digits as its factorization.

12975779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 277830, while the sum is 47.

The square root of 12975779 is about 3602.1908611288. The cubic root of 12975779 is about 234.9873480438.

The spelling of 12975779 in words is "twelve million, nine hundred seventy-five thousand, seven hundred seventy-nine".