8422649 has 2 divisors, whose sum is σ = 8422650. Its totient is φ = 8422648.

The previous prime is 8422627. The next prime is 8422691. The reversal of 8422649 is 9462248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8179600 + 243049 = 2860^2 + 493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8422649 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 8 + 4² + 2¹⁵ + 2²³ + 6³ + 4⁵ + 9 .

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8422549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4211324 + 4211325.

It is an arithmetic number, because the mean of its divisors is an integer number (4211325).

Almost surely, 2^8422649 is an apocalyptic number.

It is an amenable number.

8422649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8422649 is an equidigital number, since it uses as much as digits as its factorization.

8422649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 35.

The square root of 8422649 is about 2902.1800426576. The cubic root of 8422649 is about 203.4618086806.

The spelling of 8422649 in words is "eight million, four hundred twenty-two thousand, six hundred forty-nine".