8404489 has 2 divisors, whose sum is σ = 8404490. Its totient is φ = 8404488.

The previous prime is 8404469. The next prime is 8404531. The reversal of 8404489 is 9844048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7333264 + 1071225 = 2708^2 + 1035^2 .

It is a cyclic number.

It is not a de Polignac number, because 8404489 - 2⁹ = 8403977 is a prime.

It is a super-2 number, since 2×8404489² = 141270870702242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8404469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4202244 + 4202245.

It is an arithmetic number, because the mean of its divisors is an integer number (4202245).

Almost surely, 2^8404489 is an apocalyptic number.

It is an amenable number.

8404489 is a deficient number, since it is larger than the sum of its proper divisors (1).

8404489 is an equidigital number, since it uses as much as digits as its factorization.

8404489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 8404489 is about 2899.0496718753. The cubic root of 8404489 is about 203.3154760513.

It can be divided in two parts, 840 and 4489, that added together give a square (5329 = 73²).

The spelling of 8404489 in words is "eight million, four hundred four thousand, four hundred eighty-nine".