9909900008 has 8 divisors (see below), whose sum is σ = 18581062530. Its totient is φ = 4954950000.

The previous prime is 9909899971. The next prime is 9909900023. The reversal of 9909900008 is 8000099099.

It can be written as a sum of positive squares in only one way, i.e., 8832616324 + 1077283684 = 93982^2 + 32822^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×9909900008² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619368743 + ... + 619368758.

Almost surely, 2^9909900008 is an apocalyptic number.

It is an amenable number.

9909900008 is a deficient number, since it is larger than the sum of its proper divisors (8671162522).

9909900008 is a wasteful number, since it uses less digits than its factorization.

9909900008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238737507 (or 1238737503 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 9909900008 is about 99548.4806915706. The cubic root of 9909900008 is about 2147.9446742047.

The spelling of 9909900008 in words is "nine billion, nine hundred nine million, nine hundred thousand, eight".