99999705 has 16 divisors (see below), whose sum is σ = 172307520. Its totient is φ = 49230528.

The previous prime is 99999703. The next prime is 99999721. The reversal of 99999705 is 50799999.

It is not a de Polignac number, because 99999705 - 2¹ = 99999703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99999703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256215 + ... + 256604.

It is an arithmetic number, because the mean of its divisors is an integer number (10769220).

Almost surely, 2^99999705 is an apocalyptic number.

It is an amenable number.

99999705 is a deficient number, since it is larger than the sum of its proper divisors (72307815).

99999705 is a wasteful number, since it uses less digits than its factorization.

99999705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512840.

The product of its (nonzero) digits is 2066715, while the sum is 57.

The square root of 99999705 is about 9999.9852499891. The cubic root of 99999705 is about 464.1584269379.

The spelling of 99999705 in words is "ninety-nine million, nine hundred ninety-nine thousand, seven hundred five".