99999312 has 40 divisors (see below), whose sum is σ = 295237056. Its totient is φ = 28571136.

The previous prime is 99999307. The next prime is 99999323. The reversal of 99999312 is 21399999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148473 + ... + 149144.

Almost surely, 2^99999312 is an apocalyptic number.

It is an amenable number.

99999312 is an abundant number, since it is smaller than the sum of its proper divisors (195237744).

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

99999312 is a wasteful number, since it uses less digits than its factorization.

99999312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297635 (or 297629 counting only the distinct ones).

The product of its digits is 354294, while the sum is 51.

The square root of 99999312 is about 9999.9655999408. The cubic root of 99999312 is about 464.1578188878.

The spelling of 99999312 in words is "ninety-nine million, nine hundred ninety-nine thousand, three hundred twelve".