394911911 has 4 divisors (see below), whose sum is σ = 395129424. Its totient is φ = 394694400.

The previous prime is 394911901. The next prime is 394911931. The reversal of 394911911 is 119119493.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394911911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394911901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106010 + ... + 109671.

It is an arithmetic number, because the mean of its divisors is an integer number (98782356).

Almost surely, 2^394911911 is an apocalyptic number.

394911911 is a deficient number, since it is larger than the sum of its proper divisors (217513).

394911911 is a wasteful number, since it uses less digits than its factorization.

394911911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217512.

The product of its digits is 8748, while the sum is 38.

The square root of 394911911 is about 19872.3906714819. The cubic root of 394911911 is about 733.6688454871.

The spelling of 394911911 in words is "three hundred ninety-four million, nine hundred eleven thousand, nine hundred eleven".