9969750 has 128 divisors (see below), whose sum is σ = 31749120. Its totient is φ = 2268000.

The previous prime is 9969731. The next prime is 9969793. The reversal of 9969750 is 579699.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 9969696 and 9969705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47145 + ... + 47355.

It is an arithmetic number, because the mean of its divisors is an integer number (248040).

Almost surely, 2^9969750 is an apocalyptic number.

9969750 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9969750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15874560).

9969750 is an abundant number, since it is smaller than the sum of its proper divisors (21779370).

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

9969750 is a wasteful number, since it uses less digits than its factorization.

9969750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 9969750 is about 3157.4910926240. The cubic root of 9969750 is about 215.2260107539.

The spelling of 9969750 in words is "nine million, nine hundred sixty-nine thousand, seven hundred fifty".