12779993 has 2 divisors, whose sum is σ = 12779994. Its totient is φ = 12779992.

The previous prime is 12779969. The next prime is 12779999. The reversal of 12779993 is 39997721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8340544 + 4439449 = 2888^2 + 2107^2 .

It is a cyclic number.

It is not a de Polignac number, because 12779993 - 2¹⁸ = 12517849 is a prime.

It is not a weakly prime, because it can be changed into another prime (12779999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6389996 + 6389997.

It is an arithmetic number, because the mean of its divisors is an integer number (6389997).

Almost surely, 2^12779993 is an apocalyptic number.

It is an amenable number.

12779993 is a deficient number, since it is larger than the sum of its proper divisors (1).

12779993 is an equidigital number, since it uses as much as digits as its factorization.

12779993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 214326, while the sum is 47.

The square root of 12779993 is about 3574.9116072988. The cubic root of 12779993 is about 233.7994787878.

The spelling of 12779993 in words is "twelve million, seven hundred seventy-nine thousand, nine hundred ninety-three".