6551983 has 2 divisors, whose sum is σ = 6551984. Its totient is φ = 6551982.

The previous prime is 6551959. The next prime is 6551989. The reversal of 6551983 is 3891556.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6551983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6551989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275991 + 3275992.

It is an arithmetic number, because the mean of its divisors is an integer number (3275992).

Almost surely, 2^6551983 is an apocalyptic number.

6551983 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551983 is an equidigital number, since it uses as much as digits as its factorization.

6551983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 37.

The square root of 6551983 is about 2559.6841602041. The cubic root of 6551983 is about 187.1217429097.

The spelling of 6551983 in words is "six million, five hundred fifty-one thousand, nine hundred eighty-three".