8429994225 has 27 divisors (see below), whose sum is σ = 15101523489. Its totient is φ = 4495262400.

The previous prime is 8429994217. The next prime is 8429994241. The reversal of 8429994225 is 5224999248.

It is a happy number.

The square root of 8429994225 is 91815.

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 2548331361 + 5881662864 = 50481^2 + 76692^2 .

It is not a de Polignac number, because 8429994225 - 2³ = 8429994217 is a prime.

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 26 ways as a sum of consecutive naturals, for example, 1374165 + ... + 1380285.

Almost surely, 2^8429994225 is an apocalyptic number.

8429994225 is the 91815-th square number.

8429994225 is the 45908-th centered octagonal number.

It is an amenable number.

8429994225 is a deficient number, since it is larger than the sum of its proper divisors (6671529264).

8429994225 is an frugal number, since it uses more digits than its factorization.

8429994225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12258 (or 6129 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The cubic root of 8429994225 is about 2035.2093649734.

The spelling of 8429994225 in words is "eight billion, four hundred twenty-nine million, nine hundred ninety-four thousand, two hundred twenty-five".