12779147 has 2 divisors, whose sum is σ = 12779148. Its totient is φ = 12779146.

The previous prime is 12779141. The next prime is 12779149. The reversal of 12779147 is 74197721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12779147 - 2⁴ = 12779131 is a prime.

Together with 12779149, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12779147.

It is not a weakly prime, because it can be changed into another prime (12779141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6389573 + 6389574.

It is an arithmetic number, because the mean of its divisors is an integer number (6389574).

Almost surely, 2^12779147 is an apocalyptic number.

12779147 is a deficient number, since it is larger than the sum of its proper divisors (1).

12779147 is an equidigital number, since it uses as much as digits as its factorization.

12779147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 38.

The square root of 12779147 is about 3574.7932807367. The cubic root of 12779147 is about 233.7943197155.

The spelling of 12779147 in words is "twelve million, seven hundred seventy-nine thousand, one hundred forty-seven".