1680686963 has 8 divisors (see below), whose sum is σ = 1780118208. Its totient is φ = 1581318784.

The previous prime is 1680686941. The next prime is 1680686993. The reversal of 1680686963 is 3696860861.

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

It is a de Polignac number, because none of the positive numbers 2^k-1680686963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1680686993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46070 + ... + 74052.

It is an arithmetic number, because the mean of its divisors is an integer number (222514776).

Almost surely, 2^1680686963 is an apocalyptic number.

1680686963 is a deficient number, since it is larger than the sum of its proper divisors (99431245).

1680686963 is a wasteful number, since it uses less digits than its factorization.

1680686963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31533.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The square root of 1680686963 is about 40996.1822978677. The cubic root of 1680686963 is about 1188.9464023791.

The spelling of 1680686963 in words is "one billion, six hundred eighty million, six hundred eighty-six thousand, nine hundred sixty-three".