994238323225 has 81 divisors (see below), whose sum is σ = 1483507172511. Its totient is φ = 659053130400.

The previous prime is 994238323223. The next prime is 994238323229. The reversal of 994238323225 is 522323832499.

It is a happy number.

The square root of 994238323225 is 997115.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 357925796361 + 636312526864 = 598269^2 + 797692^2 .

It is not a de Polignac number, because 994238323225 - 2¹ = 994238323223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (994238323223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1081869316 + ... + 1081870234.

Almost surely, 2^994238323225 is an apocalyptic number.

994238323225 is the 997115-th square number.

994238323225 is the 498558-th centered octagonal number.

It is an amenable number.

994238323225 is a deficient number, since it is larger than the sum of its proper divisors (489268849286).

994238323225 is an frugal number, since it uses more digits than its factorization.

994238323225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924 (or 962 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 52.

The spelling of 994238323225 in words is "nine hundred ninety-four billion, two hundred thirty-eight million, three hundred twenty-three thousand, two hundred twenty-five".