9899748124 has 36 divisors (see below), whose sum is σ = 20429157504. Its totient is φ = 4184623296.

The previous prime is 9899748107. The next prime is 9899748137. The reversal of 9899748124 is 4218479989.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331644 + ... + 360259.

Almost surely, 2^9899748124 is an apocalyptic number.

It is an amenable number.

9899748124 is an abundant number, since it is smaller than the sum of its proper divisors (10529409380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9899748124 is a wasteful number, since it uses less digits than its factorization.

9899748124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691994 (or 691985 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 61.

The square root of 9899748124 is about 99497.4779780875. The cubic root of 9899748124 is about 2147.2109589152.

The spelling of 9899748124 in words is "nine billion, eight hundred ninety-nine million, seven hundred forty-eight thousand, one hundred twenty-four".