683487997 has 2 divisors, whose sum is σ = 683487998. Its totient is φ = 683487996.

The previous prime is 683487991. The next prime is 683488019. The reversal of 683487997 is 799784386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388129401 + 295358596 = 19701^2 + 17186^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-683487997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (683487991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341743998 + 341743999.

It is an arithmetic number, because the mean of its divisors is an integer number (341743999).

Almost surely, 2^683487997 is an apocalyptic number.

It is an amenable number.

683487997 is a deficient number, since it is larger than the sum of its proper divisors (1).

683487997 is an equidigital number, since it uses as much as digits as its factorization.

683487997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 61.

The square root of 683487997 is about 26143.6033667894. The cubic root of 683487997 is about 880.8669130026.

The spelling of 683487997 in words is "six hundred eighty-three million, four hundred eighty-seven thousand, nine hundred ninety-seven".