780079 has 4 divisors (see below), whose sum is σ = 825984. Its totient is φ = 734176.

The previous prime is 780061. The next prime is 780119. The reversal of 780079 is 970087.

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 780079 - 2⁵ = 780047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 780079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780029) 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, 22927 + ... + 22960.

It is an arithmetic number, because the mean of its divisors is an integer number (206496).

2⁷⁸⁰⁰⁷⁹ is an apocalyptic number.

780079 is a deficient number, since it is larger than the sum of its proper divisors (45905).

780079 is a wasteful number, since it uses less digits than its factorization.

780079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45904.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 780079 is about 883.2208104432. The cubic root of 780079 is about 92.0547484466.

The spelling of 780079 in words is "seven hundred eighty thousand, seventy-nine".