12867779 has 2 divisors, whose sum is σ = 12867780. Its totient is φ = 12867778.

The previous prime is 12867761. The next prime is 12867781. The reversal of 12867779 is 97776821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12867779 - 2¹⁶ = 12802243 is a prime.

It is a Sophie Germain prime.

Together with 12867781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12867719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6433889 + 6433890.

It is an arithmetic number, because the mean of its divisors is an integer number (6433890).

Almost surely, 2^12867779 is an apocalyptic number.

12867779 is a deficient number, since it is larger than the sum of its proper divisors (1).

12867779 is an equidigital number, since it uses as much as digits as its factorization.

12867779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 47.

The square root of 12867779 is about 3587.1686606570. The cubic root of 12867779 is about 234.3335819908. Note that the first 3 decimals are identical.

The spelling of 12867779 in words is "twelve million, eight hundred sixty-seven thousand, seven hundred seventy-nine".