8869009 has 2 divisors, whose sum is σ = 8869010. Its totient is φ = 8869008.

The previous prime is 8868971. The next prime is 8869037. The reversal of 8869009 is 9009688.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7924225 + 944784 = 2815^2 + 972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8869009 is a prime.

It is not a weakly prime, because it can be changed into another prime (8869039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4434504 + 4434505.

It is an arithmetic number, because the mean of its divisors is an integer number (4434505).

Almost surely, 2^8869009 is an apocalyptic number.

It is an amenable number.

8869009 is a deficient number, since it is larger than the sum of its proper divisors (1).

8869009 is an equidigital number, since it uses as much as digits as its factorization.

8869009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 8869009 is about 2978.0881451025. The cubic root of 8869009 is about 206.9942898687.

The spelling of 8869009 in words is "eight million, eight hundred sixty-nine thousand, nine".