856983983 has 2 divisors, whose sum is σ = 856983984. Its totient is φ = 856983982.

The previous prime is 856983949. The next prime is 856984003. The reversal of 856983983 is 389389658.

856983983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856983983 - 2¹⁴ = 856967599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856982983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428491991 + 428491992.

It is an arithmetic number, because the mean of its divisors is an integer number (428491992).

Almost surely, 2^856983983 is an apocalyptic number.

856983983 is a deficient number, since it is larger than the sum of its proper divisors (1).

856983983 is an equidigital number, since it uses as much as digits as its factorization.

856983983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11197440, while the sum is 59.

The square root of 856983983 is about 29274.2887701819. The cubic root of 856983983 is about 949.8555580950.

The spelling of 856983983 in words is "eight hundred fifty-six million, nine hundred eighty-three thousand, nine hundred eighty-three".