8663949 has 16 divisors (see below), whose sum is σ = 14669440. Its totient is φ = 4950720.

The previous prime is 8663923. The next prime is 8663959. The reversal of 8663949 is 9493668.

8663949 is a `hidden beast` number, since 8 + 6 + 639 + 4 + 9 = 666.

It is not a de Polignac number, because 8663949 - 2⁷ = 8663821 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8663959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22732 + ... + 23109.

It is an arithmetic number, because the mean of its divisors is an integer number (916840).

Almost surely, 2^8663949 is an apocalyptic number.

It is an amenable number.

8663949 is a deficient number, since it is larger than the sum of its proper divisors (6005491).

8663949 is a wasteful number, since it uses less digits than its factorization.

8663949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45857 (or 45851 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 8663949 is about 2943.4586798527. The cubic root of 8663949 is about 205.3865322770.

The spelling of 8663949 in words is "eight million, six hundred sixty-three thousand, nine hundred forty-nine".