1683971 has 2 divisors, whose sum is σ = 1683972. Its totient is φ = 1683970.

The previous prime is 1683949. The next prime is 1683977. The reversal of 1683971 is 1793861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1683971 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1683977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 841985 + 841986.

It is an arithmetic number, because the mean of its divisors is an integer number (841986).

2^1683971 is an apocalyptic number.

1683971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1683971 is an equidigital number, since it uses as much as digits as its factorization.

1683971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 1683971 is about 1297.6790820538. The cubic root of 1683971 is about 118.9720292992.

The spelling of 1683971 in words is "one million, six hundred eighty-three thousand, nine hundred seventy-one".