12429691 has 2 divisors, whose sum is σ = 12429692. Its totient is φ = 12429690.

The previous prime is 12429689. The next prime is 12429727. The reversal of 12429691 is 19692421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12429691 - 2¹ = 12429689 is a prime.

Together with 12429689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12429671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6214845 + 6214846.

It is an arithmetic number, because the mean of its divisors is an integer number (6214846).

Almost surely, 2^12429691 is an apocalyptic number.

12429691 is the 1885-th centered heptagonal number.

12429691 is a deficient number, since it is larger than the sum of its proper divisors (1).

12429691 is an equidigital number, since it uses as much as digits as its factorization.

12429691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 12429691 is about 3525.5766904153. The cubic root of 12429691 is about 231.6434960063.

The spelling of 12429691 in words is "twelve million, four hundred twenty-nine thousand, six hundred ninety-one".