780799 has 2 divisors, whose sum is σ = 780800. Its totient is φ = 780798.

The previous prime is 780733. The next prime is 780803. The reversal of 780799 is 997087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 780799 - 2⁷ = 780671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780719) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390399 + 390400.

It is an arithmetic number, because the mean of its divisors is an integer number (390400).

2⁷⁸⁰⁷⁹⁹ is an apocalyptic number.

780799 is a deficient number, since it is larger than the sum of its proper divisors (1).

780799 is an equidigital number, since it uses as much as digits as its factorization.

780799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 780799 is about 883.6283155264. The cubic root of 780799 is about 92.0830614071.

The spelling of 780799 in words is "seven hundred eighty thousand, seven hundred ninety-nine".