8145649 has 2 divisors, whose sum is σ = 8145650. Its totient is φ = 8145648.

The previous prime is 8145647. The next prime is 8145671. The reversal of 8145649 is 9465418.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5107600 + 3038049 = 2260^2 + 1743^2 .

It is a cyclic number.

It is not a de Polignac number, because 8145649 - 2¹ = 8145647 is a prime.

Together with 8145647, it forms a pair of twin primes.

It is a Chen prime.

8145649 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8145647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4072824 + 4072825.

It is an arithmetic number, because the mean of its divisors is an integer number (4072825).

Almost surely, 2^8145649 is an apocalyptic number.

It is an amenable number.

8145649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8145649 is an equidigital number, since it uses as much as digits as its factorization.

8145649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 8145649 is about 2854.0583385768. The cubic root of 8145649 is about 201.2064494321.

The spelling of 8145649 in words is "eight million, one hundred forty-five thousand, six hundred forty-nine".