12499691 has 2 divisors, whose sum is σ = 12499692. Its totient is φ = 12499690.

The previous prime is 12499687. The next prime is 12499699. The reversal of 12499691 is 19699421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12499691 - 2² = 12499687 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12499699) 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, 6249845 + 6249846.

It is an arithmetic number, because the mean of its divisors is an integer number (6249846).

Almost surely, 2^12499691 is an apocalyptic number.

12499691 is a deficient number, since it is larger than the sum of its proper divisors (1).

12499691 is an equidigital number, since it uses as much as digits as its factorization.

12499691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 41.

The square root of 12499691 is about 3535.4902064636. The cubic root of 12499691 is about 232.0775293303.

The spelling of 12499691 in words is "twelve million, four hundred ninety-nine thousand, six hundred ninety-one".