9998797 has 2 divisors, whose sum is σ = 9998798.
Its totient is φ = 9998796.
The previous prime is 9998777. The next prime is 9998801. The reversal of 9998797 is 7978999.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 9126441 + 872356 = 3021^2 + 934^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-9998797 is a prime.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (9998777) 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, 4999398 + 4999399.
It is an arithmetic number, because the mean of its divisors is an integer number (4999399).
Almost surely, 29998797 is an apocalyptic number.
It is an amenable number.
9998797 is a deficient number, since it is larger than the sum of its proper divisors (1).
9998797 is an equidigital number, since it uses as much as digits as its factorization.
9998797 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 2571912, while the sum is 58.
The square root of 9998797 is about 3162.0874434462.
The cubic root of 9998797 is about 215.4348293736.
The spelling of 9998797 in words is "nine million, nine hundred ninety-eight thousand, seven hundred ninety-seven".