13681667 has 2 divisors, whose sum is σ = 13681668. Its totient is φ = 13681666.

The previous prime is 13681663. The next prime is 13681669. The reversal of 13681667 is 76618631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13681667 - 2² = 13681663 is a prime.

Together with 13681669, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13681667.

It is not a weakly prime, because it can be changed into another prime (13681663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6840833 + 6840834.

It is an arithmetic number, because the mean of its divisors is an integer number (6840834).

Almost surely, 2^13681667 is an apocalyptic number.

13681667 is a deficient number, since it is larger than the sum of its proper divisors (1).

13681667 is an equidigital number, since it uses as much as digits as its factorization.

13681667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 13681667 is about 3698.8737475075. The cubic root of 13681667 is about 239.1734704622.

The spelling of 13681667 in words is "thirteen million, six hundred eighty-one thousand, six hundred sixty-seven".