9970921170 has 96 divisors (see below), whose sum is σ = 29721938688. Its totient is φ = 2271832704.

The previous prime is 9970921133. The next prime is 9970921183. The reversal of 9970921170 is 711290799.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 174747 + ... + 224673.

It is an arithmetic number, because the mean of its divisors is an integer number (309603528).

Almost surely, 2^9970921170 is an apocalyptic number.

9970921170 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a pronic number, being equal to 99854×99855.

It is a practical number, because each smaller number is the sum of distinct divisors of 9970921170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14860969344).

9970921170 is an abundant number, since it is smaller than the sum of its proper divisors (19751017518).

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

9970921170 is a wasteful number, since it uses less digits than its factorization.

9970921170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50264 (or 50261 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 45.

The square root of 9970921170 is about 99854.4999987482. The cubic root of 9970921170 is about 2152.3443812597.

The spelling of 9970921170 in words is "nine billion, nine hundred seventy million, nine hundred twenty-one thousand, one hundred seventy".