1680313771 has 2 divisors, whose sum is σ = 1680313772. Its totient is φ = 1680313770.

The previous prime is 1680313757. The next prime is 1680313793. The reversal of 1680313771 is 1773130861.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1680313771 - 2²¹ = 1678216619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1680313771.

It is not a weakly prime, because it can be changed into another prime (1680313741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840156885 + 840156886.

It is an arithmetic number, because the mean of its divisors is an integer number (840156886).

Almost surely, 2^1680313771 is an apocalyptic number.

1680313771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680313771 is an equidigital number, since it uses as much as digits as its factorization.

1680313771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 1680313771 is about 40991.6304994080. The cubic root of 1680313771 is about 1188.8583950859.

The spelling of 1680313771 in words is "one billion, six hundred eighty million, three hundred thirteen thousand, seven hundred seventy-one".