394540147 has 2 divisors, whose sum is σ = 394540148. Its totient is φ = 394540146.

The previous prime is 394540127. The next prime is 394540151. The reversal of 394540147 is 741045493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394540147 - 2¹¹ = 394538099 is a prime.

It is not a weakly prime, because it can be changed into another prime (394540117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197270073 + 197270074.

It is an arithmetic number, because the mean of its divisors is an integer number (197270074).

Almost surely, 2^394540147 is an apocalyptic number.

394540147 is a deficient number, since it is larger than the sum of its proper divisors (1).

394540147 is an equidigital number, since it uses as much as digits as its factorization.

394540147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 394540147 is about 19863.0346875798. The cubic root of 394540147 is about 733.4385516840.

The spelling of 394540147 in words is "three hundred ninety-four million, five hundred forty thousand, one hundred forty-seven".