9967698 has 40 divisors (see below), whose sum is σ = 24058188. Its totient is φ = 3066336.

The previous prime is 9967697. The next prime is 9967703. The reversal of 9967698 is 8967699.

It can be written as a sum of positive squares in 2 ways, for example, as 8661249 + 1306449 = 2943^2 + 1143^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9967691) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 261 + ... + 4472.

Almost surely, 2^9967698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9967698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12029094).

9967698 is an abundant number, since it is smaller than the sum of its proper divisors (14090490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9967698 is a wasteful number, since it uses less digits than its factorization.

9967698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4760 (or 4751 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 9967698 is about 3157.1661343680. The cubic root of 9967698 is about 215.2112436141.

Subtracting from 9967698 its reverse (8967699), we obtain a palindrome (999999).

The spelling of 9967698 in words is "nine million, nine hundred sixty-seven thousand, six hundred ninety-eight".