9979127225 has 12 divisors (see below), whose sum is σ = 12513155580. Its totient is φ = 7893600000.

The previous prime is 9979127209. The next prime is 9979127233. The reversal of 9979127225 is 5227219799.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1149142201 + 8829985024 = 33899^2 + 93968^2 .

It is not a de Polignac number, because 9979127225 - 2⁴ = 9979127209 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, 2240276 + ... + 2244725.

It is an arithmetic number, because the mean of its divisors is an integer number (1042762965).

Almost surely, 2^9979127225 is an apocalyptic number.

It is an amenable number.

9979127225 is a deficient number, since it is larger than the sum of its proper divisors (2534028355).

9979127225 is a wasteful number, since it uses less digits than its factorization.

9979127225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4485100 (or 4485095 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 53.

The square root of 9979127225 is about 99895.5816089981. The cubic root of 9979127225 is about 2152.9346782157.

The spelling of 9979127225 in words is "nine billion, nine hundred seventy-nine million, one hundred twenty-seven thousand, two hundred twenty-five".