1366969 has 4 divisors (see below), whose sum is σ = 1379620. Its totient is φ = 1354320.

The previous prime is 1366957. The next prime is 1366979. The reversal of 1366969 is 9696631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1075369 + 291600 = 1037^2 + 540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1366969 is a prime.

It is a super-2 number, since 2×1366969² = 3737208493922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1366979) 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 in 3 ways as a sum of consecutive naturals, for example, 6162 + ... + 6379.

It is an arithmetic number, because the mean of its divisors is an integer number (344905).

2^1366969 is an apocalyptic number.

It is an amenable number.

1366969 is a deficient number, since it is larger than the sum of its proper divisors (12651).

1366969 is a wasteful number, since it uses less digits than its factorization.

1366969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12650.

The product of its digits is 52488, while the sum is 40.

The square root of 1366969 is about 1169.1744951033. The cubic root of 1366969 is about 110.9820873078.

The spelling of 1366969 in words is "one million, three hundred sixty-six thousand, nine hundred sixty-nine".