394405197 has 8 divisors (see below), whose sum is σ = 525991200. Its totient is φ = 262878000.

The previous prime is 394405189. The next prime is 394405217. The reversal of 394405197 is 791504493.

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

It is not a de Polignac number, because 394405197 - 2³ = 394405189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394005197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4554 + ... + 28452.

It is an arithmetic number, because the mean of its divisors is an integer number (65748900).

Almost surely, 2^394405197 is an apocalyptic number.

It is an amenable number.

394405197 is a deficient number, since it is larger than the sum of its proper divisors (131586003).

394405197 is a wasteful number, since it uses less digits than its factorization.

394405197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29403.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 394405197 is about 19859.6373833965. The cubic root of 394405197 is about 733.3549194518.

The spelling of 394405197 in words is "three hundred ninety-four million, four hundred five thousand, one hundred ninety-seven".