8664949 has 2 divisors, whose sum is σ = 8664950. Its totient is φ = 8664948.

The previous prime is 8664947. The next prime is 8664959. The reversal of 8664949 is 9494668.

8664949 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., 7700625 + 964324 = 2775^2 + 982^2 .

It is a cyclic number.

It is not a de Polignac number, because 8664949 - 2¹ = 8664947 is a prime.

Together with 8664947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 8664899 and 8664908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8664941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4332474 + 4332475.

It is an arithmetic number, because the mean of its divisors is an integer number (4332475).

Almost surely, 2^8664949 is an apocalyptic number.

It is an amenable number.

8664949 is a deficient number, since it is larger than the sum of its proper divisors (1).

8664949 is an equidigital number, since it uses as much as digits as its factorization.

8664949 is an evil number, because the sum of its binary digits is even.

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

The square root of 8664949 is about 2943.6285431420. The cubic root of 8664949 is about 205.3944339329.

The spelling of 8664949 in words is "eight million, six hundred sixty-four thousand, nine hundred forty-nine".