1680884047 has 2 divisors, whose sum is σ = 1680884048. Its totient is φ = 1680884046.

The previous prime is 1680884021. The next prime is 1680884071. The reversal of 1680884047 is 7404880861.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1680884047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1680883988 and 1680884006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680884017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840442023 + 840442024.

It is an arithmetic number, because the mean of its divisors is an integer number (840442024).

Almost surely, 2^1680884047 is an apocalyptic number.

1680884047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680884047 is an equidigital number, since it uses as much as digits as its factorization.

1680884047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 1680884047 is about 40998.5859146386. The cubic root of 1680884047 is about 1188.9928740817.

The spelling of 1680884047 in words is "one billion, six hundred eighty million, eight hundred eighty-four thousand, forty-seven".