394999999 has 8 divisors (see below), whose sum is σ = 412375392. Its totient is φ = 377641440.

The previous prime is 394999993. The next prime is 395000003. The reversal of 394999999 is 999999493.

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 394999999 - 2²³ = 386611391 is a prime.

It is a Duffinian number.

394999999 is a modest number, since divided by 99999 gives 3949 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394999993) 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, 78829 + ... + 83689.

It is an arithmetic number, because the mean of its divisors is an integer number (51546924).

Almost surely, 2^394999999 is an apocalyptic number.

394999999 is a deficient number, since it is larger than the sum of its proper divisors (17375393).

394999999 is a wasteful number, since it uses less digits than its factorization.

394999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8417.

The product of its digits is 57395628, while the sum is 70.

The square root of 394999999 is about 19874.6068891941. The cubic root of 394999999 is about 733.7233915051.

The spelling of 394999999 in words is "three hundred ninety-four million, nine hundred ninety-nine thousand, nine hundred ninety-nine".