9800969721 has 16 divisors (see below), whose sum is σ = 13347815040. Its totient is φ = 6394668800.

The previous prime is 9800969719. The next prime is 9800969723. The reversal of 9800969721 is 1279690089.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9800969719) and next prime (9800969723).

It is a cyclic number.

It is not a de Polignac number, because 9800969721 - 2¹ = 9800969719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9800969723) 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 15 ways as a sum of consecutive naturals, for example, 13101 + ... + 140618.

It is an arithmetic number, because the mean of its divisors is an integer number (834238440).

Almost surely, 2^9800969721 is an apocalyptic number.

It is an amenable number.

9800969721 is a deficient number, since it is larger than the sum of its proper divisors (3546845319).

9800969721 is a wasteful number, since it uses less digits than its factorization.

9800969721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154176.

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 9800969721 is about 98999.8470756395. The cubic root of 9800969721 is about 2140.0455431103.

The spelling of 9800969721 in words is "nine billion, eight hundred million, nine hundred sixty-nine thousand, seven hundred twenty-one".