9999699 has 4 divisors (see below), whose sum is σ = 13332936. Its totient is φ = 6666464.

The previous prime is 9999677. The next prime is 9999713. The reversal of 9999699 is 9969999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9999699 - 2⁵ = 9999667 is a prime.

9999699 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9999659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1666614 + ... + 1666619.

It is an arithmetic number, because the mean of its divisors is an integer number (3333234).

Almost surely, 2^9999699 is an apocalyptic number.

9999699 is a deficient number, since it is larger than the sum of its proper divisors (3333237).

9999699 is a wasteful number, since it uses less digits than its factorization.

9999699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333236.

The product of its digits is 3188646, while the sum is 60.

The square root of 9999699 is about 3162.2300675315. The cubic root of 9999699 is about 215.4413073654.

The spelling of 9999699 in words is "nine million, nine hundred ninety-nine thousand, six hundred ninety-nine".