394736957 has 8 divisors (see below), whose sum is σ = 418275000. Its totient is φ = 371234304.

The previous prime is 394736921. The next prime is 394737001. The reversal of 394736957 is 759637493.

It can be written as a sum of positive squares in 4 ways, for example, as 40883236 + 353853721 = 6394^2 + 18811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 394736957 - 2¹⁰ = 394735933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 394736899 and 394736908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394706957) 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 7 ways as a sum of consecutive naturals, for example, 16169 + ... + 32417.

It is an arithmetic number, because the mean of its divisors is an integer number (52284375).

Almost surely, 2^394736957 is an apocalyptic number.

It is an amenable number.

394736957 is a deficient number, since it is larger than the sum of its proper divisors (23538043).

394736957 is a wasteful number, since it uses less digits than its factorization.

394736957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17695.

The product of its digits is 4286520, while the sum is 53.

The square root of 394736957 is about 19867.9882474296. The cubic root of 394736957 is about 733.5604860822.

It can be divided in two parts, 3947 and 36957, that added together give a palindrome (40904).

The spelling of 394736957 in words is "three hundred ninety-four million, seven hundred thirty-six thousand, nine hundred fifty-seven".