393932239393 has 24 divisors (see below), whose sum is σ = 505523579040. Its totient is φ = 303511158720.

The previous prime is 393932239391. The next prime is 393932239499.

It is a happy number.

393932239393 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 393932239393 - 2¹ = 393932239391 is a prime.

It is a super-2 number, since 2×393932239393² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393932239391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4057971 + ... + 4153912.

It is an arithmetic number, because the mean of its divisors is an integer number (21063482460).

Almost surely, 2^393932239393 is an apocalyptic number.

It is an amenable number.

393932239393 is a deficient number, since it is larger than the sum of its proper divisors (111591339647).

393932239393 is a wasteful number, since it uses less digits than its factorization.

393932239393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8211997 (or 8211990 counting only the distinct ones).

The product of its digits is 19131876, while the sum is 58.

The spelling of 393932239393 in words is "three hundred ninety-three billion, nine hundred thirty-two million, two hundred thirty-nine thousand, three hundred ninety-three".