9721610 has 8 divisors (see below), whose sum is σ = 17498916. Its totient is φ = 3888640.

The previous prime is 9721609. The next prime is 9721643. The reversal of 9721610 is 161279.

It can be written as a sum of positive squares in 2 ways, for example, as 8994001 + 727609 = 2999^2 + 853^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 9721610.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486071 + ... + 486090.

Almost surely, 2^9721610 is an apocalyptic number.

9721610 is a deficient number, since it is larger than the sum of its proper divisors (7777306).

9721610 is a wasteful number, since it uses less digits than its factorization.

9721610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972168.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 9721610 is about 3117.9496468032. The cubic root of 9721610 is about 213.4253807428.

Adding to 9721610 its reverse (161279), we get a palindrome (9882889).

The spelling of 9721610 in words is "nine million, seven hundred twenty-one thousand, six hundred ten".