8685949 has 2 divisors, whose sum is σ = 8685950. Its totient is φ = 8685948.

The previous prime is 8685923. The next prime is 8685953. The reversal of 8685949 is 9495868.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5846724 + 2839225 = 2418^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 8685949 - 2⁵ = 8685917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8685979) 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, 4342974 + 4342975.

It is an arithmetic number, because the mean of its divisors is an integer number (4342975).

Almost surely, 2^8685949 is an apocalyptic number.

It is an amenable number.

8685949 is a deficient number, since it is larger than the sum of its proper divisors (1).

8685949 is an equidigital number, since it uses as much as digits as its factorization.

8685949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 49.

The square root of 8685949 is about 2947.1934106875. The cubic root of 8685949 is about 205.5602284575.

The spelling of 8685949 in words is "eight million, six hundred eighty-five thousand, nine hundred forty-nine".