9216979825 has 24 divisors (see below), whose sum is σ = 11590385400. Its totient is φ = 7270233600.

The previous prime is 9216979813. The next prime is 9216979841. The reversal of 9216979825 is 5289796129.

It can be written as a sum of positive squares in 12 ways, for example, as 2445500304 + 6771479521 = 49452^2 + 82289^2 .

It is not a de Polignac number, because 9216979825 - 2²¹ = 9214882673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9216979825.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 501295 + ... + 519355.

It is an arithmetic number, because the mean of its divisors is an integer number (482932725).

Almost surely, 2^9216979825 is an apocalyptic number.

It is an amenable number.

9216979825 is a deficient number, since it is larger than the sum of its proper divisors (2373405575).

9216979825 is a wasteful number, since it uses less digits than its factorization.

9216979825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18357 (or 18352 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 58.

The square root of 9216979825 is about 96005.1031195738. The cubic root of 9216979825 is about 2096.6674144683.

The spelling of 9216979825 in words is "nine billion, two hundred sixteen million, nine hundred seventy-nine thousand, eight hundred twenty-five".