780609 has 8 divisors (see below), whose sum is σ = 1045120. Its totient is φ = 518256.

The previous prime is 780601. The next prime is 780613. The reversal of 780609 is 906087.

It is a happy number.

780609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 780609 - 2³ = 780601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747 + ... + 1455.

It is an arithmetic number, because the mean of its divisors is an integer number (130640).

2⁷⁸⁰⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

780609 is a deficient number, since it is larger than the sum of its proper divisors (264511).

780609 is a wasteful number, since it uses less digits than its factorization.

780609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 780609 is about 883.5207977179. The cubic root of 780609 is about 92.0755916225.

The spelling of 780609 in words is "seven hundred eighty thousand, six hundred nine".