9867442225 has 9 divisors (see below), whose sum is σ = 12236244267. Its totient is φ = 7893556440.

The previous prime is 9867442187. The next prime is 9867442229. The reversal of 9867442225 is 5222447689.

The square root of 9867442225 is 99335.

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

It can be written as a sum of positive squares in only one way, i.e., 3552279201 + 6315163024 = 59601^2 + 79468^2 .

It is not a de Polignac number, because 9867442225 - 2¹⁹ = 9866917937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9867442229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 486742 + ... + 506608.

Almost surely, 2^9867442225 is an apocalyptic number.

9867442225 is the 99335-th square number.

9867442225 is the 49668-th centered octagonal number.

It is an amenable number.

9867442225 is a deficient number, since it is larger than the sum of its proper divisors (2368802042).

9867442225 is an frugal number, since it uses more digits than its factorization.

9867442225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39744 (or 19872 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 49.

The cubic root of 9867442225 is about 2144.8727454423.

Multiplying 9867442225 by its sum of digits (49), we get a square (483504669025 = 695345²).

The spelling of 9867442225 in words is "nine billion, eight hundred sixty-seven million, four hundred forty-two thousand, two hundred twenty-five".