8404997 has 2 divisors, whose sum is σ = 8404998. Its totient is φ = 8404996.

The previous prime is 8404993. The next prime is 8405003. The reversal of 8404997 is 7994048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7392961 + 1012036 = 2719^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 8404997 - 2² = 8404993 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 (8404993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4202498 + 4202499.

It is an arithmetic number, because the mean of its divisors is an integer number (4202499).

Almost surely, 2^8404997 is an apocalyptic number.

It is an amenable number.

8404997 is a deficient number, since it is larger than the sum of its proper divisors (1).

8404997 is an equidigital number, since it uses as much as digits as its factorization.

8404997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 8404997 is about 2899.1372854696. The cubic root of 8404997 is about 203.3195723614.

The spelling of 8404997 in words is "eight million, four hundred four thousand, nine hundred ninety-seven".