394739427 has 4 divisors (see below), whose sum is σ = 526319240. Its totient is φ = 263159616.

The previous prime is 394739419. The next prime is 394739453. The reversal of 394739427 is 724937493.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 394739427 - 2³ = 394739419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394739627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65789902 + ... + 65789907.

It is an arithmetic number, because the mean of its divisors is an integer number (131579810).

Almost surely, 2^394739427 is an apocalyptic number.

394739427 is a deficient number, since it is larger than the sum of its proper divisors (131579813).

394739427 is a wasteful number, since it uses less digits than its factorization.

394739427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131579812.

The product of its digits is 1143072, while the sum is 48.

The square root of 394739427 is about 19868.0504076268. The cubic root of 394739427 is about 733.5620161227.

The spelling of 394739427 in words is "three hundred ninety-four million, seven hundred thirty-nine thousand, four hundred twenty-seven".