12269891 has 2 divisors, whose sum is σ = 12269892. Its totient is φ = 12269890.

The previous prime is 12269863. The next prime is 12269899. The reversal of 12269891 is 19896221.

It is a strong prime.

It is an emirp because it is prime and its reverse (19896221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12269891 - 2⁶ = 12269827 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12269899) 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, 6134945 + 6134946.

It is an arithmetic number, because the mean of its divisors is an integer number (6134946).

Almost surely, 2^12269891 is an apocalyptic number.

12269891 is a deficient number, since it is larger than the sum of its proper divisors (1).

12269891 is an equidigital number, since it uses as much as digits as its factorization.

12269891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 38.

The square root of 12269891 is about 3502.8404188601. The cubic root of 12269891 is about 230.6465174558.

The spelling of 12269891 in words is "twelve million, two hundred sixty-nine thousand, eight hundred ninety-one".