780804983 has 4 divisors (see below), whose sum is σ = 892348560. Its totient is φ = 669261408.

The previous prime is 780804979. The next prime is 780805009. The reversal of 780804983 is 389408087.

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 780804983 - 2² = 780804979 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780804383) 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, 55771778 + ... + 55771791.

It is an arithmetic number, because the mean of its divisors is an integer number (223087140).

Almost surely, 2^780804983 is an apocalyptic number.

780804983 is a deficient number, since it is larger than the sum of its proper divisors (111543577).

780804983 is a wasteful number, since it uses less digits than its factorization.

780804983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111543576.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 780804983 is about 27942.8878786714. The cubic root of 780804983 is about 920.8329660698.

The spelling of 780804983 in words is "seven hundred eighty million, eight hundred four thousand, nine hundred eighty-three".