780943 has 4 divisors (see below), whose sum is σ = 787968. Its totient is φ = 773920.

The previous prime is 780931. The next prime is 780953. The reversal of 780943 is 349087.

It is a happy number.

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 780943 - 2¹⁷ = 649871 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780953) 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 in 3 ways as a sum of consecutive naturals, for example, 3343 + ... + 3568.

It is an arithmetic number, because the mean of its divisors is an integer number (196992).

2⁷⁸⁰⁹⁴³ is an apocalyptic number.

780943 is a deficient number, since it is larger than the sum of its proper divisors (7025).

780943 is a wasteful number, since it uses less digits than its factorization.

780943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7024.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 780943 is about 883.7097939935. The cubic root of 780943 is about 92.0887219103.

The spelling of 780943 in words is "seven hundred eighty thousand, nine hundred forty-three".