1680807794 has 8 divisors (see below), whose sum is σ = 2521450668. Its totient is φ = 840324240.

The previous prime is 1680807701. The next prime is 1680807803. The reversal of 1680807794 is 4977080861.

It can be written as a sum of positive squares in 2 ways, for example, as 1320377569 + 360430225 = 36337^2 + 18985^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1680807794² = 5650229680742292872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8537 + ... + 58604.

Almost surely, 2^1680807794 is an apocalyptic number.

1680807794 is a deficient number, since it is larger than the sum of its proper divisors (840642874).

1680807794 is a wasteful number, since it uses less digits than its factorization.

1680807794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79660.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 1680807794 is about 40997.6559573837. The cubic root of 1680807794 is about 1188.9748943277.

The spelling of 1680807794 in words is "one billion, six hundred eighty million, eight hundred seven thousand, seven hundred ninety-four".