780947 has 6 divisors (see below), whose sum is σ = 798588. Its totient is φ = 763584.

The previous prime is 780931. The next prime is 780953. The reversal of 780947 is 749087.

It is not a de Polignac number, because 780947 - 2⁴ = 780931 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 780947.

It is not an unprimeable number, because it can be changed into a prime (780917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8003 + ... + 8099.

It is an arithmetic number, because the mean of its divisors is an integer number (133098).

2⁷⁸⁰⁹⁴⁷ is an apocalyptic number.

780947 is a deficient number, since it is larger than the sum of its proper divisors (17641).

780947 is an frugal number, since it uses more digits than its factorization.

780947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 780947 is about 883.7120571770. The cubic root of 780947 is about 92.0888791366.

The spelling of 780947 in words is "seven hundred eighty thousand, nine hundred forty-seven".