9917249 has 2 divisors, whose sum is σ = 9917250. Its totient is φ = 9917248.

The previous prime is 9917231. The next prime is 9917263. The reversal of 9917249 is 9427199.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5640625 + 4276624 = 2375^2 + 2068^2 .

It is a cyclic number.

It is not a de Polignac number, because 9917249 - 2¹² = 9913153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9917279) 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, 4958624 + 4958625.

It is an arithmetic number, because the mean of its divisors is an integer number (4958625).

Almost surely, 2^9917249 is an apocalyptic number.

It is an amenable number.

9917249 is a deficient number, since it is larger than the sum of its proper divisors (1).

9917249 is an equidigital number, since it uses as much as digits as its factorization.

9917249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The square root of 9917249 is about 3149.1663976360. The cubic root of 9917249 is about 214.8475501217.

The spelling of 9917249 in words is "nine million, nine hundred seventeen thousand, two hundred forty-nine".