394518994 has 4 divisors (see below), whose sum is σ = 591778494. Its totient is φ = 197259496.

The previous prime is 394518979. The next prime is 394519001. The reversal of 394518994 is 499815493.

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

It can be written as a sum of positive squares in only one way, i.e., 331713369 + 62805625 = 18213^2 + 7925^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98629747 + ... + 98629750.

Almost surely, 2^394518994 is an apocalyptic number.

394518994 is a deficient number, since it is larger than the sum of its proper divisors (197259500).

394518994 is a wasteful number, since it uses less digits than its factorization.

394518994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197259499.

The product of its digits is 1399680, while the sum is 52.

The square root of 394518994 is about 19862.5022089363. The cubic root of 394518994 is about 733.4254438478.

The spelling of 394518994 in words is "three hundred ninety-four million, five hundred eighteen thousand, nine hundred ninety-four".