9720974025 has 135 divisors (see below), whose sum is σ = 21013593381. Its totient is φ = 4429676160.

The previous prime is 9720973991. The next prime is 9720974033. The reversal of 9720974025 is 5204790279.

The square root of 9720974025 is 98595.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5461062201 + 4259911824 = 73899^2 + 65268^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is not a de Polignac number, because 9720974025 - 2⁹ = 9720973513 is a prime.

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 134 ways as a sum of consecutive naturals, for example, 31057269 + ... + 31057581.

Almost surely, 2^9720974025 is an apocalyptic number.

9720974025 is the 98595-th square number.

9720974025 is the 49298-th centered octagonal number.

It is an amenable number.

9720974025 is an abundant number, since it is smaller than the sum of its proper divisors (11292619356).

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

9720974025 is an equidigital number, since it uses as much as digits as its factorization.

9720974025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The cubic root of 9720974025 is about 2134.2072663830.

The spelling of 9720974025 in words is "nine billion, seven hundred twenty million, nine hundred seventy-four thousand, twenty-five".