683855971 has 2 divisors, whose sum is σ = 683855972. Its totient is φ = 683855970.

The previous prime is 683855947. The next prime is 683855983. The reversal of 683855971 is 179558386.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 683855971 - 2¹⁹ = 683331683 is a prime.

It is not a weakly prime, because it can be changed into another prime (683855911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341927985 + 341927986.

It is an arithmetic number, because the mean of its divisors is an integer number (341927986).

Almost surely, 2^683855971 is an apocalyptic number.

683855971 is a deficient number, since it is larger than the sum of its proper divisors (1).

683855971 is an equidigital number, since it uses as much as digits as its factorization.

683855971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 52.

The square root of 683855971 is about 26150.6399730485. The cubic root of 683855971 is about 881.0249640443.

The spelling of 683855971 in words is "six hundred eighty-three million, eight hundred fifty-five thousand, nine hundred seventy-one".