394690811 has 4 divisors (see below), whose sum is σ = 394743624. Its totient is φ = 394638000.

The previous prime is 394690789. The next prime is 394690843. The reversal of 394690811 is 118096493.

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

It is a cyclic number.

It is not a de Polignac number, because 394690811 - 2¹⁰ = 394689787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394690861) 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, 12890 + ... + 30911.

It is an arithmetic number, because the mean of its divisors is an integer number (98685906).

Almost surely, 2^394690811 is an apocalyptic number.

394690811 is a deficient number, since it is larger than the sum of its proper divisors (52813).

394690811 is an equidigital number, since it uses as much as digits as its factorization.

394690811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52812.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 394690811 is about 19866.8268981234. The cubic root of 394690811 is about 733.5318997871.

The spelling of 394690811 in words is "three hundred ninety-four million, six hundred ninety thousand, eight hundred eleven".