394874243 has 4 divisors (see below), whose sum is σ = 399631848. Its totient is φ = 390116640.

The previous prime is 394874231. The next prime is 394874251. The reversal of 394874243 is 342478493.

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

It is a cyclic number.

It is not a de Polignac number, because 394874243 - 2²⁶ = 327765379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 394874194 and 394874203.

It is not an unprimeable number, because it can be changed into a prime (394874273) 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, 2378678 + ... + 2378843.

It is an arithmetic number, because the mean of its divisors is an integer number (99907962).

Almost surely, 2^394874243 is an apocalyptic number.

394874243 is a deficient number, since it is larger than the sum of its proper divisors (4757605).

394874243 is an equidigital number, since it uses as much as digits as its factorization.

394874243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4757604.

The product of its digits is 580608, while the sum is 44.

The square root of 394874243 is about 19871.4429018126. The cubic root of 394874243 is about 733.6455181610.

The spelling of 394874243 in words is "three hundred ninety-four million, eight hundred seventy-four thousand, two hundred forty-three".