8249609 has 4 divisors (see below), whose sum is σ = 8405316. Its totient is φ = 8093904.

The previous prime is 8249599. The next prime is 8249611. The reversal of 8249609 is 9069428.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5856400 + 2393209 = 2420^2 + 1547^2 .

It is a cyclic number.

It is not a de Polignac number, because 8249609 - 2¹² = 8245513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8249699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77774 + ... + 77879.

It is an arithmetic number, because the mean of its divisors is an integer number (2101329).

Almost surely, 2^8249609 is an apocalyptic number.

It is an amenable number.

8249609 is a deficient number, since it is larger than the sum of its proper divisors (155707).

8249609 is a wasteful number, since it uses less digits than its factorization.

8249609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155706.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 8249609 is about 2872.2132580991. The cubic root of 8249609 is about 202.0588088093.

The spelling of 8249609 in words is "eight million, two hundred forty-nine thousand, six hundred nine".