9913189225 has 9 divisors (see below), whose sum is σ = 12292971973. Its totient is φ = 7930153120.

The previous prime is 9913189211. The next prime is 9913189309. The reversal of 9913189225 is 5229813199.

The square root of 9913189225 is 99565.

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 4871621209 + 5041568016 = 69797^2 + 71004^2 .

It is not a de Polignac number, because 9913189225 - 2²⁹ = 9376318313 is a prime.

It is a super-2 number, since 2×9913189225² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 487869 + ... + 507781.

Almost surely, 2^9913189225 is an apocalyptic number.

9913189225 is the 99565-th square number.

9913189225 is the 49783-rd centered octagonal number.

It is an amenable number.

9913189225 is a deficient number, since it is larger than the sum of its proper divisors (2379782748).

9913189225 is an frugal number, since it uses more digits than its factorization.

9913189225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39836 (or 19918 counting only the distinct ones).

The product of its digits is 349920, while the sum is 49.

The cubic root of 9913189225 is about 2148.1822909522.

Multiplying 9913189225 by its sum of digits (49), we get a square (485746272025 = 696955²).

It can be divided in two parts, 99131 and 89225, that added together give a square (188356 = 434²).

The spelling of 9913189225 in words is "nine billion, nine hundred thirteen million, one hundred eighty-nine thousand, two hundred twenty-five".