9929681970 has 64 divisors (see below), whose sum is σ = 26148697344. Its totient is φ = 2398106880.

The previous prime is 9929681947. The next prime is 9929681977. The reversal of 9929681970 is 791869299.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9929681977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219526 + ... + 260865.

It is an arithmetic number, because the mean of its divisors is an integer number (408573396).

Almost surely, 2^9929681970 is an apocalyptic number.

9929681970 is an abundant number, since it is smaller than the sum of its proper divisors (16219015374).

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

9929681970 is a wasteful number, since it uses less digits than its factorization.

9929681970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480467.

The product of its (nonzero) digits is 4408992, while the sum is 60.

The square root of 9929681970 is about 99647.7895891324. The cubic root of 9929681970 is about 2149.3729536102.

The spelling of 9929681970 in words is "nine billion, nine hundred twenty-nine million, six hundred eighty-one thousand, nine hundred seventy".