394239573225 has 63 divisors (see below), whose sum is σ = 733107936999. Its totient is φ = 210215898000.

The previous prime is 394239573223. The next prime is 394239573229. The reversal of 394239573225 is 522375932493.

The square root of 394239573225 is 627885.

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

394239573225 is a `hidden beast` number, since 3 + 9 + 42 + 3 + 9 + 573 + 2 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 141926246361 + 252313326864 = 376731^2 + 502308^2 .

It is not a de Polignac number, because 394239573225 - 2¹ = 394239573223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394239573223) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 84762150 + ... + 84766800.

Almost surely, 2^394239573225 is an apocalyptic number.

394239573225 is the 627885-th square number.

394239573225 is the 313943-rd centered octagonal number.

It is an amenable number.

394239573225 is a deficient number, since it is larger than the sum of its proper divisors (338868363774).

394239573225 is an frugal number, since it uses more digits than its factorization.

394239573225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9330 (or 4659 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 54.

The spelling of 394239573225 in words is "three hundred ninety-four billion, two hundred thirty-nine million, five hundred seventy-three thousand, two hundred twenty-five".