1680306323 has 4 divisors (see below), whose sum is σ = 1680474240. Its totient is φ = 1680138408.

The previous prime is 1680306311. The next prime is 1680306347. The reversal of 1680306323 is 3236030861.

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 1680306323 - 2³⁰ = 606564499 is a prime.

It is a super-2 number, since 2×1680306323² = 5646858678227560658, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1680306323.

It is not an unprimeable number, because it can be changed into a prime (1680306623) 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, 67928 + ... + 89301.

It is an arithmetic number, because the mean of its divisors is an integer number (420118560).

Almost surely, 2^1680306323 is an apocalyptic number.

1680306323 is a deficient number, since it is larger than the sum of its proper divisors (167917).

1680306323 is a wasteful number, since it uses less digits than its factorization.

1680306323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167916.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 1680306323 is about 40991.5396514939. The cubic root of 1680306323 is about 1188.8566385428.

The spelling of 1680306323 in words is "one billion, six hundred eighty million, three hundred six thousand, three hundred twenty-three".