13857667 has 2 divisors, whose sum is σ = 13857668. Its totient is φ = 13857666.

The previous prime is 13857637. The next prime is 13857691. The reversal of 13857667 is 76675831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13857667 is a prime.

It is not a weakly prime, because it can be changed into another prime (13857607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6928833 + 6928834.

It is an arithmetic number, because the mean of its divisors is an integer number (6928834).

Almost surely, 2^13857667 is an apocalyptic number.

13857667 is a deficient number, since it is larger than the sum of its proper divisors (1).

13857667 is an equidigital number, since it uses as much as digits as its factorization.

13857667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 13857667 is about 3722.5887497815. The cubic root of 13857667 is about 240.1946742247.

The spelling of 13857667 in words is "thirteen million, eight hundred fifty-seven thousand, six hundred sixty-seven".