99128013 has 8 divisors (see below), whose sum is σ = 132221376. Its totient is φ = 66060000.

The previous prime is 99127993. The next prime is 99128017. The reversal of 99128013 is 31082199.

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

It is not a de Polignac number, because 99128013 - 2⁸ = 99127757 is a prime.

It is a super-2 number, since 2×99128013² = 19652725922656338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99128017) 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, 6513 + ... + 15513.

It is an arithmetic number, because the mean of its divisors is an integer number (16527672).

Almost surely, 2^99128013 is an apocalyptic number.

It is an amenable number.

99128013 is a deficient number, since it is larger than the sum of its proper divisors (33093363).

99128013 is a wasteful number, since it uses less digits than its factorization.

99128013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12675.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 99128013 is about 9956.3051881710. The cubic root of 99128013 is about 462.8058077851.

The spelling of 99128013 in words is "ninety-nine million, one hundred twenty-eight thousand, thirteen".