1365080809 has 3 divisors (see below), whose sum is σ = 1365117757. Its totient is φ = 1365043862.

The previous prime is 1365080803. The next prime is 1365080833. The reversal of 1365080809 is 9080805631.

It is a happy number.

The square root of 1365080809 is 36947.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1365080809 - 2²⁹ = 828209897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1365080803) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18474 + ... + 55420.

Almost surely, 2^1365080809 is an apocalyptic number.

1365080809 is the 36947-th square number.

1365080809 is the 18474-th centered octagonal number.

It is an amenable number.

1365080809 is a deficient number, since it is larger than the sum of its proper divisors (36948).

1365080809 is an frugal number, since it uses more digits than its factorization.

1365080809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73894 (or 36947 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The cubic root of 1365080809 is about 1109.3096399808.

The spelling of 1365080809 in words is "one billion, three hundred sixty-five million, eighty thousand, eight hundred nine".