8648749 has 2 divisors, whose sum is σ = 8648750. Its totient is φ = 8648748.

The previous prime is 8648747. The next prime is 8648779. The reversal of 8648749 is 9478468.

It is a happy number.

8648749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8037225 + 611524 = 2835^2 + 782^2 .

It is a cyclic number.

It is not a de Polignac number, because 8648749 - 2¹ = 8648747 is a prime.

Together with 8648747, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 8648699 and 8648708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8648741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4324374 + 4324375.

It is an arithmetic number, because the mean of its divisors is an integer number (4324375).

Almost surely, 2^8648749 is an apocalyptic number.

It is an amenable number.

8648749 is a deficient number, since it is larger than the sum of its proper divisors (1).

8648749 is an equidigital number, since it uses as much as digits as its factorization.

8648749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 46.

The square root of 8648749 is about 2940.8755499001. The cubic root of 8648749 is about 205.2663521782.

The spelling of 8648749 in words is "eight million, six hundred forty-eight thousand, seven hundred forty-nine".