9689999 has 4 divisors (see below), whose sum is σ = 10570920. Its totient is φ = 8809080.

The previous prime is 9689993. The next prime is 9690029. The reversal of 9689999 is 9999869.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9689999 is a prime.

It is a Duffinian number.

9689999 is a modest number, since divided by 9999 gives 968 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9689993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440444 + ... + 440465.

It is an arithmetic number, because the mean of its divisors is an integer number (2642730).

Almost surely, 2^9689999 is an apocalyptic number.

9689999 is a deficient number, since it is larger than the sum of its proper divisors (880921).

9689999 is a wasteful number, since it uses less digits than its factorization.

9689999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880920.

The product of its digits is 2834352, while the sum is 59.

The square root of 9689999 is about 3112.8763226315. The cubic root of 9689999 is about 213.1938033463.

The spelling of 9689999 in words is "nine million, six hundred eighty-nine thousand, nine hundred ninety-nine".