394076340025 has 9 divisors (see below), whose sum is σ = 488658553743. Its totient is φ = 315258561000.

The previous prime is 394076340017. The next prime is 394076340029. The reversal of 394076340025 is 520043670493.

The square root of 394076340025 is 627755.

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., 141867482409 + 252208857616 = 376653^2 + 502204^2 .

It is not a de Polignac number, because 394076340025 - 2³ = 394076340017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394076340029) 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 8 ways as a sum of consecutive naturals, for example, 3076000 + ... + 3201550.

Almost surely, 2^394076340025 is an apocalyptic number.

394076340025 is the 627755-th square number.

394076340025 is the 313878-th centered octagonal number.

It is an amenable number.

394076340025 is a deficient number, since it is larger than the sum of its proper divisors (94582213718).

394076340025 is an frugal number, since it uses more digits than its factorization.

394076340025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251112 (or 125556 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 43.

The spelling of 394076340025 in words is "three hundred ninety-four billion, seventy-six million, three hundred forty thousand, twenty-five".