9983551 has 2 divisors, whose sum is σ = 9983552. Its totient is φ = 9983550.

The previous prime is 9983549. The next prime is 9983579. The reversal of 9983551 is 1553899.

9983551 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9983551 - 2¹ = 9983549 is a prime.

Together with 9983549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9983591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4991775 + 4991776.

It is an arithmetic number, because the mean of its divisors is an integer number (4991776).

Almost surely, 2^9983551 is an apocalyptic number.

9983551 is a deficient number, since it is larger than the sum of its proper divisors (1).

9983551 is an equidigital number, since it uses as much as digits as its factorization.

9983551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 40.

The square root of 9983551 is about 3159.6757745060. The cubic root of 9983551 is about 215.3252765205.

The spelling of 9983551 in words is "nine million, nine hundred eighty-three thousand, five hundred fifty-one".