8427649 has 4 divisors (see below), whose sum is σ = 8438320. Its totient is φ = 8416980.

The previous prime is 8427647. The next prime is 8427667. The reversal of 8427649 is 9467248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8427649 - 2¹ = 8427647 is a prime.

It is a Duffinian number.

8427649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8427647) 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, 4047 + ... + 5764.

It is an arithmetic number, because the mean of its divisors is an integer number (2109580).

Almost surely, 2^8427649 is an apocalyptic number.

It is an amenable number.

8427649 is a deficient number, since it is larger than the sum of its proper divisors (10671).

8427649 is an equidigital number, since it uses as much as digits as its factorization.

8427649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10670.

The product of its digits is 96768, while the sum is 40.

The square root of 8427649 is about 2903.0413362541. The cubic root of 8427649 is about 203.5020615672.

The spelling of 8427649 in words is "eight million, four hundred twenty-seven thousand, six hundred forty-nine".