1369409 has 4 divisors (see below), whose sum is σ = 1416660. Its totient is φ = 1322160.

The previous prime is 1369393. The next prime is 1369411. The reversal of 1369409 is 9049631.

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 485809 + 883600 = 697^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 1369409 - 2⁴ = 1369393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1369429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23582 + ... + 23639.

It is an arithmetic number, because the mean of its divisors is an integer number (354165).

2^1369409 is an apocalyptic number.

It is an amenable number.

1369409 is a deficient number, since it is larger than the sum of its proper divisors (47251).

1369409 is an equidigital number, since it uses as much as digits as its factorization.

1369409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47250.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1369409 is about 1170.2175011510. The cubic root of 1369409 is about 111.0480813261.

The spelling of 1369409 in words is "one million, three hundred sixty-nine thousand, four hundred nine".