1680315839 has 4 divisors (see below), whose sum is σ = 1681069224. Its totient is φ = 1679562456.

The previous prime is 1680315809. The next prime is 1680315841. The reversal of 1680315839 is 9385130861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9385130861 = 337 ⋅27849053.

It is a cyclic number.

It is not a de Polignac number, because 1680315839 - 2⁸ = 1680315583 is a prime.

It is a super-2 number, since 2×1680315839² = 5646922637588547842, 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 1680315839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680315809) 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, 373337 + ... + 377810.

It is an arithmetic number, because the mean of its divisors is an integer number (420267306).

Almost surely, 2^1680315839 is an apocalyptic number.

1680315839 is a deficient number, since it is larger than the sum of its proper divisors (753385).

1680315839 is an equidigital number, since it uses as much as digits as its factorization.

1680315839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753384.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 1680315839 is about 40991.6557240617. The cubic root of 1680315839 is about 1188.8588828039.

The spelling of 1680315839 in words is "one billion, six hundred eighty million, three hundred fifteen thousand, eight hundred thirty-nine".