99999699 has 8 divisors (see below), whose sum is σ = 139130112.
Its totient is φ = 63767880.
The previous prime is 99999677. The next prime is 99999703. The reversal of 99999699 is 99699999.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 99999699 - 29 = 99999187 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (69), and also a Moran number because the ratio is a prime number: 1449271 = 99999699 / (9 + 9 + 9 + 9 + 9 + 6 + 9 + 9).
It is not an unprimeable number, because it can be changed into a prime (99995699) 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, 724567 + ... + 724704.
It is an arithmetic number, because the mean of its divisors is an integer number (17391264).
Almost surely, 299999699 is an apocalyptic number.
99999699 is a deficient number, since it is larger than the sum of its proper divisors (39130413).
99999699 is a wasteful number, since it uses less digits than its factorization.
99999699 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1449297.
The product of its digits is 28697814, while the sum is 69.
The square root of 99999699 is about 9999.9849499887.
The cubic root of 99999699 is about 464.1584176547.
The spelling of 99999699 in words is "ninety-nine million, nine hundred ninety-nine thousand, six hundred ninety-nine".