394454454493 has 4 divisors (see below), whose sum is σ = 430313950368. Its totient is φ = 358594958620.

The previous prime is 394454454463. The next prime is 394454454517.

It is a happy number.

394454454493 is nontrivially palindromic in base 10.

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 394454454493 - 2⁵ = 394454454461 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 (394454454403) 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, 17929747921 + ... + 17929747942.

It is an arithmetic number, because the mean of its divisors is an integer number (107578487592).

Almost surely, 2^394454454493 is an apocalyptic number.

It is an amenable number.

394454454493 is a deficient number, since it is larger than the sum of its proper divisors (35859495875).

394454454493 is a wasteful number, since it uses less digits than its factorization.

394454454493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35859495874.

The product of its digits is 74649600, while the sum is 58.

The spelling of 394454454493 in words is "three hundred ninety-four billion, four hundred fifty-four million, four hundred fifty-four thousand, four hundred ninety-three".