9899257 has 2 divisors, whose sum is σ = 9899258. Its totient is φ = 9899256.

The previous prime is 9899221. The next prime is 9899273. The reversal of 9899257 is 7529989.

9899257 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8620096 + 1279161 = 2936^2 + 1131^2 .

It is a cyclic number.

It is not a de Polignac number, because 9899257 - 2¹⁵ = 9866489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9899257.

It is not a weakly prime, because it can be changed into another prime (9899297) 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, 4949628 + 4949629.

It is an arithmetic number, because the mean of its divisors is an integer number (4949629).

Almost surely, 2^9899257 is an apocalyptic number.

It is an amenable number.

9899257 is a deficient number, since it is larger than the sum of its proper divisors (1).

9899257 is an equidigital number, since it uses as much as digits as its factorization.

9899257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 49.

The square root of 9899257 is about 3146.3084718444. The cubic root of 9899257 is about 214.7175450797.

The spelling of 9899257 in words is "nine million, eight hundred ninety-nine thousand, two hundred fifty-seven".