1369643 has 4 divisors (see below), whose sum is σ = 1494168. Its totient is φ = 1245120.

The previous prime is 1369619. The next prime is 1369651. The reversal of 1369643 is 3469631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3469631 = 11 ⋅315421.

It is a cyclic number.

It is not a de Polignac number, because 1369643 - 2¹² = 1365547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1369243) 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 in 3 ways as a sum of consecutive naturals, for example, 62246 + ... + 62267.

It is an arithmetic number, because the mean of its divisors is an integer number (373542).

2^1369643 is an apocalyptic number.

1369643 is a deficient number, since it is larger than the sum of its proper divisors (124525).

1369643 is a wasteful number, since it uses less digits than its factorization.

1369643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124524.

The product of its digits is 11664, while the sum is 32.

The square root of 1369643 is about 1170.3174782938. The cubic root of 1369643 is about 111.0544061399.

It can be divided in two parts, 136 and 9643, that added together give a palindrome (9779).

The spelling of 1369643 in words is "one million, three hundred sixty-nine thousand, six hundred forty-three".