1366939 has 4 divisors (see below), whose sum is σ = 1562224. Its totient is φ = 1171656.

The previous prime is 1366933. The next prime is 1366943. The reversal of 1366939 is 9396631.

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

It is a cyclic number.

It is not a de Polignac number, because 1366939 - 2⁵ = 1366907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1366898 and 1366907.

It is not an unprimeable number, because it can be changed into a prime (1366933) 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, 97632 + ... + 97645.

It is an arithmetic number, because the mean of its divisors is an integer number (390556).

2^1366939 is an apocalyptic number.

1366939 is a deficient number, since it is larger than the sum of its proper divisors (195285).

1366939 is an equidigital number, since it uses as much as digits as its factorization.

1366939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195284.

The product of its digits is 26244, while the sum is 37.

The square root of 1366939 is about 1169.1616654680. The cubic root of 1366939 is about 110.9812754174.

The spelling of 1366939 in words is "one million, three hundred sixty-six thousand, nine hundred thirty-nine".