9663988 has 6 divisors (see below), whose sum is σ = 16911986. Its totient is φ = 4831992.

The previous prime is 9663977. The next prime is 9664003. The reversal of 9663988 is 8893669.

It can be written as a sum of positive squares in only one way, i.e., 7033104 + 2630884 = 2652^2 + 1622^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1207995 + ... + 1208002.

Almost surely, 2^9663988 is an apocalyptic number.

It is an amenable number.

9663988 is a deficient number, since it is larger than the sum of its proper divisors (7247998).

9663988 is a wasteful number, since it uses less digits than its factorization.

9663988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416001 (or 2415999 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The square root of 9663988 is about 3108.6955463667. The cubic root of 9663988 is about 213.0028727011.

The spelling of 9663988 in words is "nine million, six hundred sixty-three thousand, nine hundred eighty-eight".