8659949 has 2 divisors, whose sum is σ = 8659950. Its totient is φ = 8659948.

The previous prime is 8659939. The next prime is 8659957. The reversal of 8659949 is 9499568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8305924 + 354025 = 2882^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 8659949 - 2¹⁶ = 8594413 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8659897 and 8659906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8659909) 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, 4329974 + 4329975.

It is an arithmetic number, because the mean of its divisors is an integer number (4329975).

Almost surely, 2^8659949 is an apocalyptic number.

It is an amenable number.

8659949 is a deficient number, since it is larger than the sum of its proper divisors (1).

8659949 is an equidigital number, since it uses as much as digits as its factorization.

8659949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 50.

The square root of 8659949 is about 2942.7791286469. The cubic root of 8659949 is about 205.3549195719.

The spelling of 8659949 in words is "eight million, six hundred fifty-nine thousand, nine hundred forty-nine".