9969999698 has 16 divisors (see below), whose sum is σ = 15204145176. Its totient is φ = 4901994240.

The previous prime is 9969999671. The next prime is 9969999703. The reversal of 9969999698 is 8969999699.

It can be written as a sum of positive squares in 4 ways, for example, as 9201989329 + 768010369 = 95927^2 + 27713^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598490 + ... + 614922.

Almost surely, 2^9969999698 is an apocalyptic number.

9969999698 is a deficient number, since it is larger than the sum of its proper divisors (5234145478).

9969999698 is a wasteful number, since it uses less digits than its factorization.

9969999698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21469.

The product of its digits is 1377495072, while the sum is 83.

The square root of 9969999698 is about 99849.8858186628. The cubic root of 9969999698 is about 2152.2780755778.

Subtracting from 9969999698 its reverse (8969999699), we obtain a palindrome (999999999).

The spelling of 9969999698 in words is "nine billion, nine hundred sixty-nine million, nine hundred ninety-nine thousand, six hundred ninety-eight".