8289649 has 2 divisors, whose sum is σ = 8289650. Its totient is φ = 8289648.

The previous prime is 8289647. The next prime is 8289653. The reversal of 8289649 is 9469828.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4545424 + 3744225 = 2132^2 + 1935^2 .

It is a cyclic number.

It is not a de Polignac number, because 8289649 - 2¹ = 8289647 is a prime.

Together with 8289647, it forms a pair of twin primes.

8289649 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8289599 and 8289608.

It is not a weakly prime, because it can be changed into another prime (8289647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4144824 + 4144825.

It is an arithmetic number, because the mean of its divisors is an integer number (4144825).

Almost surely, 2^8289649 is an apocalyptic number.

It is an amenable number.

8289649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8289649 is an equidigital number, since it uses as much as digits as its factorization.

8289649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 8289649 is about 2879.1750554629. The cubic root of 8289649 is about 202.3851830952.

The spelling of 8289649 in words is "eight million, two hundred eighty-nine thousand, six hundred forty-nine".