394613405 has 8 divisors (see below), whose sum is σ = 474879672. Its totient is φ = 314795008.

The previous prime is 394613393. The next prime is 394613431. The reversal of 394613405 is 504316493.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 82101721 + 312511684 = 9061^2 + 17678^2 .

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 394613405 - 2⁴ = 394613389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110024 + ... + 113553.

It is an arithmetic number, because the mean of its divisors is an integer number (59359959).

Almost surely, 2^394613405 is an apocalyptic number.

It is an amenable number.

394613405 is a deficient number, since it is larger than the sum of its proper divisors (80266267).

394613405 is a wasteful number, since it uses less digits than its factorization.

394613405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223935.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 394613405 is about 19864.8786807269. The cubic root of 394613405 is about 733.4839436986.

Adding to 394613405 its reverse (504316493), we get a palindrome (898929898).

The spelling of 394613405 in words is "three hundred ninety-four million, six hundred thirteen thousand, four hundred five".