8398997 has 2 divisors, whose sum is σ = 8398998. Its totient is φ = 8398996.

The previous prime is 8398993. The next prime is 8399011. The reversal of 8398997 is 7998938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7695076 + 703921 = 2774^2 + 839^2 .

It is a cyclic number.

It is not a de Polignac number, because 8398997 - 2² = 8398993 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 (8398993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4199498 + 4199499.

It is an arithmetic number, because the mean of its divisors is an integer number (4199499).

Almost surely, 2^8398997 is an apocalyptic number.

It is an amenable number.

8398997 is a deficient number, since it is larger than the sum of its proper divisors (1).

8398997 is an equidigital number, since it uses as much as digits as its factorization.

8398997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 8398997 is about 2898.1023101333. The cubic root of 8398997 is about 203.2711802033.

The spelling of 8398997 in words is "eight million, three hundred ninety-eight thousand, nine hundred ninety-seven".