999494225 has 6 divisors (see below), whose sum is σ = 1239372870. Its totient is φ = 799595360.

The previous prime is 999494213. The next prime is 999494231. The reversal of 999494225 is 522494999.

It can be written as a sum of positive squares in 3 ways, for example, as 112169281 + 887324944 = 10591^2 + 29788^2 .

It is not a de Polignac number, because 999494225 - 2²⁴ = 982717009 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19989860 + ... + 19989909.

It is an arithmetic number, because the mean of its divisors is an integer number (206562145).

Almost surely, 2^999494225 is an apocalyptic number.

It is an amenable number.

999494225 is a deficient number, since it is larger than the sum of its proper divisors (239878645).

999494225 is a wasteful number, since it uses less digits than its factorization.

999494225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39979779 (or 39979774 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 53.

The square root of 999494225 is about 31614.7785853389. The cubic root of 999494225 is about 999.8313799022.

The spelling of 999494225 in words is "nine hundred ninety-nine million, four hundred ninety-four thousand, two hundred twenty-five".