394111911 has 16 divisors (see below), whose sum is σ = 534835808. Its totient is φ = 258076800.

The previous prime is 394111909. The next prime is 394111931. The reversal of 394111911 is 119111493.

It is a happy number.

It is not a de Polignac number, because 394111911 - 2¹ = 394111909 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 (394111931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225501 + ... + 227241.

It is an arithmetic number, because the mean of its divisors is an integer number (33427238).

Almost surely, 2^394111911 is an apocalyptic number.

394111911 is a deficient number, since it is larger than the sum of its proper divisors (140723897).

394111911 is a wasteful number, since it uses less digits than its factorization.

394111911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042.

The product of its digits is 972, while the sum is 30.

The square root of 394111911 is about 19852.2520384968. The cubic root of 394111911 is about 733.1730962342.

The spelling of 394111911 in words is "three hundred ninety-four million, one hundred eleven thousand, nine hundred eleven".