9989690 has 8 divisors (see below), whose sum is σ = 17981460. Its totient is φ = 3995872.

The previous prime is 9989689. The next prime is 9989699. The reversal of 9989690 is 969899.

9989690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8196769 + 1792921 = 2863^2 + 1339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×9989690² = 199587812592200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9989699) 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, 499475 + ... + 499494.

Almost surely, 2^9989690 is an apocalyptic number.

9989690 is a deficient number, since it is larger than the sum of its proper divisors (7991770).

9989690 is a wasteful number, since it uses less digits than its factorization.

9989690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998976.

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 9989690 is about 3160.6470856456. The cubic root of 9989690 is about 215.3694028044.

The spelling of 9989690 in words is "nine million, nine hundred eighty-nine thousand, six hundred ninety".