1366769 has 2 divisors, whose sum is σ = 1366770. Its totient is φ = 1366768.

The previous prime is 1366763. The next prime is 1366793. The reversal of 1366769 is 9676631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 976144 + 390625 = 988^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366769 - 2⁴ = 1366753 is a prime.

It is a super-2 number, since 2×1366769² = 3736114998722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1366763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683384 + 683385.

It is an arithmetic number, because the mean of its divisors is an integer number (683385).

2^1366769 is an apocalyptic number.

It is an amenable number.

1366769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366769 is an equidigital number, since it uses as much as digits as its factorization.

1366769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 38.

The square root of 1366769 is about 1169.0889615423. The cubic root of 1366769 is about 110.9766744808.

The spelling of 1366769 in words is "one million, three hundred sixty-six thousand, seven hundred sixty-nine".