1680604106 has 4 divisors (see below), whose sum is σ = 2520906162. Its totient is φ = 840302052.

The previous prime is 1680604097. The next prime is 1680604111. The reversal of 1680604106 is 6014060861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1642275625 + 38328481 = 40525^2 + 6191^2 .

It is a super-2 number, since 2×1680604106² = 5648860322208118472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420151025 + ... + 420151028.

Almost surely, 2^1680604106 is an apocalyptic number.

1680604106 is a deficient number, since it is larger than the sum of its proper divisors (840302056).

1680604106 is an equidigital number, since it uses as much as digits as its factorization.

1680604106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840302055.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1680604106 is about 40995.1717400964. The cubic root of 1680604106 is about 1188.9268639099.

Adding to 1680604106 its reverse (6014060861), we get a palindrome (7694664967).

The spelling of 1680604106 in words is "one billion, six hundred eighty million, six hundred four thousand, one hundred six".