12778967 has 2 divisors, whose sum is σ = 12778968. Its totient is φ = 12778966.

The previous prime is 12778943. The next prime is 12778973. The reversal of 12778967 is 76987721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12778967 - 2¹⁰ = 12777943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12774967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6389483 + 6389484.

It is an arithmetic number, because the mean of its divisors is an integer number (6389484).

Almost surely, 2^12778967 is an apocalyptic number.

12778967 is a deficient number, since it is larger than the sum of its proper divisors (1).

12778967 is an equidigital number, since it uses as much as digits as its factorization.

12778967 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 12778967 is about 3574.7681043671. The cubic root of 12778967 is about 233.7932220112.

The spelling of 12778967 in words is "twelve million, seven hundred seventy-eight thousand, nine hundred sixty-seven".