12791777 has 2 divisors, whose sum is σ = 12791778. Its totient is φ = 12791776.

The previous prime is 12791773. The next prime is 12791789. The reversal of 12791777 is 77719721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7845601 + 4946176 = 2801^2 + 2224^2 .

It is a cyclic number.

It is not a de Polignac number, because 12791777 - 2² = 12791773 is a prime.

It is not a weakly prime, because it can be changed into another prime (12791773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6395888 + 6395889.

It is an arithmetic number, because the mean of its divisors is an integer number (6395889).

Almost surely, 2^12791777 is an apocalyptic number.

It is an amenable number.

12791777 is a deficient number, since it is larger than the sum of its proper divisors (1).

12791777 is an equidigital number, since it uses as much as digits as its factorization.

12791777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43218, while the sum is 41.

The square root of 12791777 is about 3576.5593801865. The cubic root of 12791777 is about 233.8713162476.

The spelling of 12791777 in words is "twelve million, seven hundred ninety-one thousand, seven hundred seventy-seven".