12019691 has 2 divisors, whose sum is σ = 12019692. Its totient is φ = 12019690.

The previous prime is 12019687. The next prime is 12019699. The reversal of 12019691 is 19691021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12019691 - 2² = 12019687 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 (12019699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6009845 + 6009846.

It is an arithmetic number, because the mean of its divisors is an integer number (6009846).

Almost surely, 2^12019691 is an apocalyptic number.

12019691 is a deficient number, since it is larger than the sum of its proper divisors (1).

12019691 is an equidigital number, since it uses as much as digits as its factorization.

12019691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 12019691 is about 3466.9426011978. The cubic root of 12019691 is about 229.0680054568.

The spelling of 12019691 in words is "twelve million, nineteen thousand, six hundred ninety-one".