9989261225 has 12 divisors (see below), whose sum is σ = 12422186700. Its totient is φ = 7968504000.

The previous prime is 9989261213. The next prime is 9989261239. The reversal of 9989261225 is 5221629899.

It can be written as a sum of positive squares in 6 ways, for example, as 1317181849 + 8672079376 = 36293^2 + 93124^2 .

It is not a de Polignac number, because 9989261225 - 2⁴ = 9989261209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 563726 + ... + 581175.

It is an arithmetic number, because the mean of its divisors is an integer number (1035182225).

Almost surely, 2^9989261225 is an apocalyptic number.

It is an amenable number.

9989261225 is a deficient number, since it is larger than the sum of its proper divisors (2432925475).

9989261225 is a wasteful number, since it uses less digits than its factorization.

9989261225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145260 (or 1145255 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 53.

The square root of 9989261225 is about 99946.2917020937. The cubic root of 9989261225 is about 2153.6632141628.

The spelling of 9989261225 in words is "nine billion, nine hundred eighty-nine million, two hundred sixty-one thousand, two hundred twenty-five".