394691223 has 4 divisors (see below), whose sum is σ = 526254968. Its totient is φ = 263127480.

The previous prime is 394691207. The next prime is 394691239. The reversal of 394691223 is 322196493.

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

It is an interprime number because it is at equal distance from previous prime (394691207) and next prime (394691239).

It is not a de Polignac number, because 394691223 - 2⁴ = 394691207 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 (394691203) 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, 65781868 + ... + 65781873.

It is an arithmetic number, because the mean of its divisors is an integer number (131563742).

Almost surely, 2^394691223 is an apocalyptic number.

394691223 is a deficient number, since it is larger than the sum of its proper divisors (131563745).

394691223 is a wasteful number, since it uses less digits than its factorization.

394691223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131563744.

The product of its digits is 69984, while the sum is 39.

The square root of 394691223 is about 19866.8372671646. The cubic root of 394691223 is about 733.5321550207.

The spelling of 394691223 in words is "three hundred ninety-four million, six hundred ninety-one thousand, two hundred twenty-three".