9129939225 has 24 divisors (see below), whose sum is σ = 16467091872. Its totient is φ = 4426636800.

The previous prime is 9129939209. The next prime is 9129939311. The reversal of 9129939225 is 5229399219.

It is not a de Polignac number, because 9129939225 - 2⁴ = 9129939209 is a prime.

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, 5532472 + ... + 5534121.

It is an arithmetic number, because the mean of its divisors is an integer number (686128828).

Almost surely, 2^9129939225 is an apocalyptic number.

It is an amenable number.

9129939225 is a deficient number, since it is larger than the sum of its proper divisors (7337152647).

9129939225 is a wasteful number, since it uses less digits than its factorization.

9129939225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11066617 (or 11066612 counting only the distinct ones).

The product of its digits is 787320, while the sum is 51.

The square root of 9129939225 is about 95550.7154604297. The cubic root of 9129939225 is about 2090.0465657383.

The spelling of 9129939225 in words is "nine billion, one hundred twenty-nine million, nine hundred thirty-nine thousand, two hundred twenty-five".