394493961 has 8 divisors (see below), whose sum is σ = 530647200. Its totient is φ = 260668352.

The previous prime is 394493929. The next prime is 394493977. The reversal of 394493961 is 169394493.

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

It is a cyclic number.

It is not a de Polignac number, because 394493961 - 2⁵ = 394493929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394493961.

It is not an unprimeable number, because it can be changed into a prime (394493461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581511 + ... + 582188.

It is an arithmetic number, because the mean of its divisors is an integer number (66330900).

Almost surely, 2^394493961 is an apocalyptic number.

It is an amenable number.

394493961 is a deficient number, since it is larger than the sum of its proper divisors (136153239).

394493961 is a wasteful number, since it uses less digits than its factorization.

394493961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163815.

The product of its digits is 629856, while the sum is 48.

The square root of 394493961 is about 19861.8720416782. The cubic root of 394493961 is about 733.4099310945.

The spelling of 394493961 in words is "three hundred ninety-four million, four hundred ninety-three thousand, nine hundred sixty-one".