99989913 has 8 divisors (see below), whose sum is σ = 140336800. Its totient is φ = 63151488.

The previous prime is 99989909. The next prime is 99989963. The reversal of 99989913 is 31998999.

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

It is not a de Polignac number, because 99989913 - 2² = 99989909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 1754209 = 99989913 / (9 + 9 + 9 + 8 + 9 + 9 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99989963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 877048 + ... + 877161.

It is an arithmetic number, because the mean of its divisors is an integer number (17542100).

Almost surely, 2^99989913 is an apocalyptic number.

It is an amenable number.

99989913 is a deficient number, since it is larger than the sum of its proper divisors (40346887).

99989913 is a wasteful number, since it uses less digits than its factorization.

99989913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754231.

The product of its digits is 1417176, while the sum is 57.

The square root of 99989913 is about 9999.4956372809. The cubic root of 99989913 is about 464.1432762676.

The spelling of 99989913 in words is "ninety-nine million, nine hundred eighty-nine thousand, nine hundred thirteen".