394236473 has 4 divisors (see below), whose sum is σ = 400699428. Its totient is φ = 387773520.

The previous prime is 394236467. The next prime is 394236503. The reversal of 394236473 is 374632493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 374632493 = 193 ⋅1941101.

It can be written as a sum of positive squares in 2 ways, for example, as 15077689 + 379158784 = 3883^2 + 19472^2 .

It is a cyclic number.

It is not a de Polignac number, because 394236473 - 2²⁰ = 393187897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 394236473.

It is not an unprimeable number, because it can be changed into a prime (394236433) 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, 3231386 + ... + 3231507.

It is an arithmetic number, because the mean of its divisors is an integer number (100174857).

Almost surely, 2^394236473 is an apocalyptic number.

It is an amenable number.

394236473 is a deficient number, since it is larger than the sum of its proper divisors (6462955).

394236473 is an equidigital number, since it uses as much as digits as its factorization.

394236473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6462954.

The product of its digits is 326592, while the sum is 41.

The square root of 394236473 is about 19855.3890165869. The cubic root of 394236473 is about 733.2503297009.

The spelling of 394236473 in words is "three hundred ninety-four million, two hundred thirty-six thousand, four hundred seventy-three".