8646949 has 2 divisors, whose sum is σ = 8646950. Its totient is φ = 8646948.

The previous prime is 8646947. The next prime is 8646961. The reversal of 8646949 is 9496468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8352100 + 294849 = 2890^2 + 543^2 .

It is a cyclic number.

It is not a de Polignac number, because 8646949 - 2¹ = 8646947 is a prime.

Together with 8646947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 8646899 and 8646908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8646943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4323474 + 4323475.

It is an arithmetic number, because the mean of its divisors is an integer number (4323475).

Almost surely, 2^8646949 is an apocalyptic number.

It is an amenable number.

8646949 is a deficient number, since it is larger than the sum of its proper divisors (1).

8646949 is an equidigital number, since it uses as much as digits as its factorization.

8646949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 46.

The square root of 8646949 is about 2940.5695026644. The cubic root of 8646949 is about 205.2521110022.

The spelling of 8646949 in words is "eight million, six hundred forty-six thousand, nine hundred forty-nine".