394136966 has 4 divisors (see below), whose sum is σ = 591205452. Its totient is φ = 197068482.

The previous prime is 394136927. The next prime is 394136983. The reversal of 394136966 is 669631493.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 394136966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98534240 + ... + 98534243.

It is an arithmetic number, because the mean of its divisors is an integer number (147801363).

Almost surely, 2^394136966 is an apocalyptic number.

394136966 is a deficient number, since it is larger than the sum of its proper divisors (197068486).

394136966 is a wasteful number, since it uses less digits than its factorization.

394136966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197068485.

The product of its digits is 629856, while the sum is 47.

The square root of 394136966 is about 19852.8830651873. The cubic root of 394136966 is about 733.1886326526.

The spelling of 394136966 in words is "three hundred ninety-four million, one hundred thirty-six thousand, nine hundred sixty-six".