9634981 has 2 divisors, whose sum is σ = 9634982. Its totient is φ = 9634980.

The previous prime is 9634979. The next prime is 9634987. The reversal of 9634981 is 1894369.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8946081 + 688900 = 2991^2 + 830^2 .

It is an emirp because it is prime and its reverse (1894369) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9634981 - 2¹ = 9634979 is a prime.

It is a super-2 number, since 2×9634981² = 185665717740722, which contains 22 as substring.

Together with 9634979, it forms a pair of twin primes.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9634987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4817490 + 4817491.

It is an arithmetic number, because the mean of its divisors is an integer number (4817491).

Almost surely, 2^9634981 is an apocalyptic number.

It is an amenable number.

9634981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9634981 is an equidigital number, since it uses as much as digits as its factorization.

9634981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 40.

The square root of 9634981 is about 3104.0265784945. The cubic root of 9634981 is about 212.7895457793.

The spelling of 9634981 in words is "nine million, six hundred thirty-four thousand, nine hundred eighty-one".