9899913 has 8 divisors (see below), whose sum is σ = 13773888. Its totient is φ = 6312944.

The previous prime is 9899891. The next prime is 9899921. The reversal of 9899913 is 3199989.

9899913 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9899913 - 2¹² = 9895817 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9899963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71670 + ... + 71807.

It is an arithmetic number, because the mean of its divisors is an integer number (1721736).

Almost surely, 2^9899913 is an apocalyptic number.

It is an amenable number.

9899913 is a deficient number, since it is larger than the sum of its proper divisors (3873975).

9899913 is a wasteful number, since it uses less digits than its factorization.

9899913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143503.

The product of its digits is 157464, while the sum is 48.

The square root of 9899913 is about 3146.4127192725. The cubic root of 9899913 is about 214.7222879137.

The spelling of 9899913 in words is "nine million, eight hundred ninety-nine thousand, nine hundred thirteen".