999113213 has 8 divisors (see below), whose sum is σ = 1168398528. Its totient is φ = 836466624.

The previous prime is 999113177. The next prime is 999113221. The reversal of 999113213 is 312311999.

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

It is not a de Polignac number, because 999113213 - 2⁶ = 999113149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999113243) 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, 1659356 + ... + 1659957.

It is an arithmetic number, because the mean of its divisors is an integer number (146049816).

Almost surely, 2^999113213 is an apocalyptic number.

It is an amenable number.

999113213 is a deficient number, since it is larger than the sum of its proper divisors (169285315).

999113213 is a wasteful number, since it uses less digits than its factorization.

999113213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319363.

The product of its digits is 13122, while the sum is 38.

The square root of 999113213 is about 31608.7521582235. The cubic root of 999113213 is about 999.7043169135.

The spelling of 999113213 in words is "nine hundred ninety-nine million, one hundred thirteen thousand, two hundred thirteen".