8249009 has 2 divisors, whose sum is σ = 8249010. Its totient is φ = 8249008.

The previous prime is 8248987. The next prime is 8249023. The reversal of 8249009 is 9009428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8248384 + 625 = 2872^2 + 25^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8249009 is a prime.

It is a super-2 number, since 2×8249009² = 136092298964162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8249089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4124504 + 4124505.

It is an arithmetic number, because the mean of its divisors is an integer number (4124505).

Almost surely, 2^8249009 is an apocalyptic number.

It is an amenable number.

8249009 is a deficient number, since it is larger than the sum of its proper divisors (1).

8249009 is an equidigital number, since it uses as much as digits as its factorization.

8249009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 8249009 is about 2872.1088071311. The cubic root of 8249009 is about 202.0539100630.

The spelling of 8249009 in words is "eight million, two hundred forty-nine thousand, nine".