12988691 has 2 divisors, whose sum is σ = 12988692. Its totient is φ = 12988690.

The previous prime is 12988681. The next prime is 12988699. The reversal of 12988691 is 19688921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12988691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12988699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6494345 + 6494346.

It is an arithmetic number, because the mean of its divisors is an integer number (6494346).

Almost surely, 2^12988691 is an apocalyptic number.

12988691 is a deficient number, since it is larger than the sum of its proper divisors (1).

12988691 is an equidigital number, since it uses as much as digits as its factorization.

12988691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 44.

The square root of 12988691 is about 3603.9826581159. The cubic root of 12988691 is about 235.0652663144.

The spelling of 12988691 in words is "twelve million, nine hundred eighty-eight thousand, six hundred ninety-one".