9899597 has 2 divisors, whose sum is σ = 9899598. Its totient is φ = 9899596.

The previous prime is 9899587. The next prime is 9899599. The reversal of 9899597 is 7959989.

9899597 is digitally balanced in base 2, 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., 5692996 + 4206601 = 2386^2 + 2051^2 .

It is a cyclic number.

It is not a de Polignac number, because 9899597 - 2⁴ = 9899581 is a prime.

Together with 9899599, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9899599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4949798 + 4949799.

It is an arithmetic number, because the mean of its divisors is an integer number (4949799).

Almost surely, 2^9899597 is an apocalyptic number.

It is an amenable number.

9899597 is a deficient number, since it is larger than the sum of its proper divisors (1).

9899597 is an equidigital number, since it uses as much as digits as its factorization.

9899597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 56.

The square root of 9899597 is about 3146.3625029548. The cubic root of 9899597 is about 214.7200032820.

The spelling of 9899597 in words is "nine million, eight hundred ninety-nine thousand, five hundred ninety-seven".