780904197 has 12 divisors (see below), whose sum is σ = 1194324300. Its totient is φ = 489979008.

The previous prime is 780904193. The next prime is 780904213. The reversal of 780904197 is 791409087.

780904197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 681523236 + 99380961 = 26106^2 + 9969^2 .

It is not a de Polignac number, because 780904197 - 2² = 780904193 is a prime.

It is a super-2 number, since 2×780904197² = 1219622729784429618, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780904193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2551822 + ... + 2552127.

It is an arithmetic number, because the mean of its divisors is an integer number (99527025).

Almost surely, 2^780904197 is an apocalyptic number.

It is an amenable number.

780904197 is a deficient number, since it is larger than the sum of its proper divisors (413420103).

780904197 is a wasteful number, since it uses less digits than its factorization.

780904197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103972 (or 5103969 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 780904197 is about 27944.6631219630. The cubic root of 780904197 is about 920.8719666972.

The spelling of 780904197 in words is "seven hundred eighty million, nine hundred four thousand, one hundred ninety-seven".