12999967 has 2 divisors, whose sum is σ = 12999968. Its totient is φ = 12999966.

The previous prime is 12999953. The next prime is 12999977. The reversal of 12999967 is 76999921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12999967 - 2²³ = 4611359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12999937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6499983 + 6499984.

It is an arithmetic number, because the mean of its divisors is an integer number (6499984).

Almost surely, 2^12999967 is an apocalyptic number.

12999967 is a deficient number, since it is larger than the sum of its proper divisors (1).

12999967 is an equidigital number, since it uses as much as digits as its factorization.

12999967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 551124, while the sum is 52.

The square root of 12999967 is about 3605.5466991845. The cubic root of 12999967 is about 235.1332698128.

The spelling of 12999967 in words is "twelve million, nine hundred ninety-nine thousand, nine hundred sixty-seven".