394551133423 has 4 divisors (see below), whose sum is σ = 394853010120. Its totient is φ = 394249256728.

The previous prime is 394551133411. The next prime is 394551133433. The reversal of 394551133423 is 324331155493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324331155493 = 73 ⋅4442892541.

It is a cyclic number.

It is not a de Polignac number, because 394551133423 - 2⁵ = 394551133391 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 394551133423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394551133433) 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, 150936388 + ... + 150939001.

It is an arithmetic number, because the mean of its divisors is an integer number (98713252530).

Almost surely, 2^394551133423 is an apocalyptic number.

394551133423 is a deficient number, since it is larger than the sum of its proper divisors (301876697).

394551133423 is a wasteful number, since it uses less digits than its factorization.

394551133423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301876696.

The product of its digits is 583200, while the sum is 43.

The spelling of 394551133423 in words is "three hundred ninety-four billion, five hundred fifty-one million, one hundred thirty-three thousand, four hundred twenty-three".