780834823 has 2 divisors, whose sum is σ = 780834824. Its totient is φ = 780834822.

The previous prime is 780834809. The next prime is 780834833. The reversal of 780834823 is 328438087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 780834823 - 2⁹ = 780834311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 780834823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780834833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390417411 + 390417412.

It is an arithmetic number, because the mean of its divisors is an integer number (390417412).

Almost surely, 2^780834823 is an apocalyptic number.

780834823 is a deficient number, since it is larger than the sum of its proper divisors (1).

780834823 is an equidigital number, since it uses as much as digits as its factorization.

780834823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 780834823 is about 27943.4218198130. The cubic root of 780834823 is about 920.8446964021.

The spelling of 780834823 in words is "seven hundred eighty million, eight hundred thirty-four thousand, eight hundred twenty-three".