394747493 has 4 divisors (see below), whose sum is σ = 451140000. Its totient is φ = 338354988.

The previous prime is 394747489. The next prime is 394747519.

It is a happy number.

394747493 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 394747493 - 2² = 394747489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394747403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28196243 + ... + 28196256.

It is an arithmetic number, because the mean of its divisors is an integer number (112785000).

Almost surely, 2^394747493 is an apocalyptic number.

It is an amenable number.

394747493 is a deficient number, since it is larger than the sum of its proper divisors (56392507).

394747493 is an equidigital number, since it uses as much as digits as its factorization.

394747493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56392506.

The product of its digits is 2286144, while the sum is 50.

The square root of 394747493 is about 19868.2533958071. The cubic root of 394747493 is about 733.5670125588.

The spelling of 394747493 in words is "three hundred ninety-four million, seven hundred forty-seven thousand, four hundred ninety-three".