394223469 has 4 divisors (see below), whose sum is σ = 525631296. Its totient is φ = 262815644.

The previous prime is 394223449. The next prime is 394223471. The reversal of 394223469 is 964322493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 394223469 - 2¹³ = 394215277 is a prime.

It is a super-2 number, since 2×394223469² = 310824287020787922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 394223469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394223449) 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, 65703909 + ... + 65703914.

It is an arithmetic number, because the mean of its divisors is an integer number (131407824).

Almost surely, 2^394223469 is an apocalyptic number.

It is an amenable number.

394223469 is a deficient number, since it is larger than the sum of its proper divisors (131407827).

394223469 is a wasteful number, since it uses less digits than its factorization.

394223469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131407826.

The product of its digits is 279936, while the sum is 42.

The square root of 394223469 is about 19855.0615461146. The cubic root of 394223469 is about 733.2422674568.

The spelling of 394223469 in words is "three hundred ninety-four million, two hundred twenty-three thousand, four hundred sixty-nine".