9721690530 has 16 divisors (see below), whose sum is σ = 23332057344. Its totient is φ = 2592450800.

The previous prime is 9721690481. The next prime is 9721690571. The reversal of 9721690530 is 350961279.

It is a super-2 number, since 2×9721690530² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162028146 + ... + 162028205.

It is an arithmetic number, because the mean of its divisors is an integer number (1458253584).

Almost surely, 2^9721690530 is an apocalyptic number.

9721690530 is an abundant number, since it is smaller than the sum of its proper divisors (13610366814).

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

9721690530 is a wasteful number, since it uses less digits than its factorization.

9721690530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324056361.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 9721690530 is about 98598.6335098007. The cubic root of 9721690530 is about 2134.2597005185.

The spelling of 9721690530 in words is "nine billion, seven hundred twenty-one million, six hundred ninety thousand, five hundred thirty".