8259649 has 2 divisors, whose sum is σ = 8259650. Its totient is φ = 8259648.

The previous prime is 8259631. The next prime is 8259659. The reversal of 8259649 is 9469528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8225424 + 34225 = 2868^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 8259649 - 2⁷ = 8259521 is a prime.

It is a d-powerful number, because it can be written as 8⁷ + 2 + 5⁹ + 9³ + 6⁵ + 4¹¹ + 9⁴ .

8259649 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8259659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4129824 + 4129825.

It is an arithmetic number, because the mean of its divisors is an integer number (4129825).

Almost surely, 2^8259649 is an apocalyptic number.

It is an amenable number.

8259649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8259649 is an equidigital number, since it uses as much as digits as its factorization.

8259649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 8259649 is about 2873.9605077314. The cubic root of 8259649 is about 202.1407459457.

The spelling of 8259649 in words is "eight million, two hundred fifty-nine thousand, six hundred forty-nine".