394936837 has 4 divisors (see below), whose sum is σ = 395002476. Its totient is φ = 394871200.

The previous prime is 394936823. The next prime is 394936847. The reversal of 394936837 is 738639493.

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

It can be written as a sum of positive squares in 2 ways, for example, as 56340036 + 338596801 = 7506^2 + 18401^2 .

It is a cyclic number.

It is not a de Polignac number, because 394936837 - 2⁷ = 394936709 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 (394936847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22768 + ... + 36169.

It is an arithmetic number, because the mean of its divisors is an integer number (98750619).

Almost surely, 2^394936837 is an apocalyptic number.

It is an amenable number.

394936837 is a deficient number, since it is larger than the sum of its proper divisors (65639).

394936837 is an equidigital number, since it uses as much as digits as its factorization.

394936837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65638.

The product of its digits is 2939328, while the sum is 52.

The square root of 394936837 is about 19873.0178131053. The cubic root of 394936837 is about 733.6842810348.

The spelling of 394936837 in words is "three hundred ninety-four million, nine hundred thirty-six thousand, eight hundred thirty-seven".