13657769 has 2 divisors, whose sum is σ = 13657770. Its totient is φ = 13657768.

The previous prime is 13657759. The next prime is 13657771. The reversal of 13657769 is 96775631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9078169 + 4579600 = 3013^2 + 2140^2 .

It is an emirp because it is prime and its reverse (96775631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13657769 - 2¹⁶ = 13592233 is a prime.

It is a super-2 number, since 2×13657769² = 373069308114722, which contains 22 as substring.

Together with 13657771, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13657739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6828884 + 6828885.

It is an arithmetic number, because the mean of its divisors is an integer number (6828885).

Almost surely, 2^13657769 is an apocalyptic number.

It is an amenable number.

13657769 is a deficient number, since it is larger than the sum of its proper divisors (1).

13657769 is an equidigital number, since it uses as much as digits as its factorization.

13657769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 44.

The square root of 13657769 is about 3695.6418928246. The cubic root of 13657769 is about 239.0341331828.

The spelling of 13657769 in words is "thirteen million, six hundred fifty-seven thousand, seven hundred sixty-nine".