394409508433 has 8 divisors (see below), whose sum is σ = 408022626600. Its totient is φ = 380797243008.

The previous prime is 394409508397. The next prime is 394409508473. The reversal of 394409508433 is 334805904493.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37817803024 + 356591705409 = 194468^2 + 597153^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394409508433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394409508473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 811335 + ... + 1202947.

It is an arithmetic number, because the mean of its divisors is an integer number (51002828325).

Almost surely, 2^394409508433 is an apocalyptic number.

It is an amenable number.

394409508433 is a deficient number, since it is larger than the sum of its proper divisors (13613118167).

394409508433 is a wasteful number, since it uses less digits than its factorization.

394409508433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426371.

The product of its (nonzero) digits is 5598720, while the sum is 52.

The spelling of 394409508433 in words is "three hundred ninety-four billion, four hundred nine million, five hundred eight thousand, four hundred thirty-three".