9553981 has 2 divisors, whose sum is σ = 9553982. Its totient is φ = 9553980.

The previous prime is 9553967. The next prime is 9553987. The reversal of 9553981 is 1893559.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6205081 + 3348900 = 2491^2 + 1830^2 .

It is a cyclic number.

It is not a de Polignac number, because 9553981 - 2⁷ = 9553853 is a prime.

It is a super-2 number, since 2×9553981² = 182557105896722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9553987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4776990 + 4776991.

It is an arithmetic number, because the mean of its divisors is an integer number (4776991).

Almost surely, 2^9553981 is an apocalyptic number.

It is an amenable number.

9553981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9553981 is an equidigital number, since it uses as much as digits as its factorization.

9553981 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 9553981 is about 3090.9514716346. The cubic root of 9553981 is about 212.1915691569.

The spelling of 9553981 in words is "nine million, five hundred fifty-three thousand, nine hundred eighty-one".