9999969 has 24 divisors (see below), whose sum is σ = 15786720. Its totient is φ = 5612544.

The previous prime is 9999943. The next prime is 9999971. The reversal of 9999969 is 9699999.

It is not a de Polignac number, because 9999969 - 2⁵ = 9999937 is a prime.

It is a super-2 number, since 2×9999969² = 199998760001922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9999929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8097 + ... + 9249.

It is an arithmetic number, because the mean of its divisors is an integer number (657780).

Almost surely, 2^9999969 is an apocalyptic number.

It is an amenable number.

9999969 is a deficient number, since it is larger than the sum of its proper divisors (5786751).

9999969 is a wasteful number, since it uses less digits than its factorization.

9999969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1222 counting only the distinct ones).

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

The square root of 9999969 is about 3162.2727586342. The cubic root of 9999969 is about 215.4432463780.

The spelling of 9999969 in words is "nine million, nine hundred ninety-nine thousand, nine hundred sixty-nine".