394990470925 has 12 divisors (see below), whose sum is σ = 501734238516. Its totient is φ = 308285244800.

The previous prime is 394990470913. The next prime is 394990470989. The reversal of 394990470925 is 529074099493.

It can be written as a sum of positive squares in 6 ways, for example, as 117465909289 + 277524561636 = 342733^2 + 526806^2 .

It is not a de Polignac number, because 394990470925 - 2⁵ = 394990470893 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 192677254 + ... + 192679303.

It is an arithmetic number, because the mean of its divisors is an integer number (41811186543).

Almost surely, 2^394990470925 is an apocalyptic number.

It is an amenable number.

394990470925 is a deficient number, since it is larger than the sum of its proper divisors (106743767591).

394990470925 is a wasteful number, since it uses less digits than its factorization.

394990470925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385356608 (or 385356603 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 61.

The spelling of 394990470925 in words is "three hundred ninety-four billion, nine hundred ninety million, four hundred seventy thousand, nine hundred twenty-five".