1680313 has 2 divisors, whose sum is σ = 1680314. Its totient is φ = 1680312.

The previous prime is 1680277. The next prime is 1680317. The reversal of 1680313 is 3130861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1671849 + 8464 = 1293^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680313 - 2⁹ = 1679801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840156 + 840157.

It is an arithmetic number, because the mean of its divisors is an integer number (840157).

2^1680313 is an apocalyptic number.

It is an amenable number.

1680313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680313 is an equidigital number, since it uses as much as digits as its factorization.

1680313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1680313 is about 1296.2688764296. The cubic root of 1680313 is about 118.8858213253.

The spelling of 1680313 in words is "one million, six hundred eighty thousand, three hundred thirteen".