393845640133 has 4 divisors (see below), whose sum is σ = 429649789248. Its totient is φ = 358041491020.

The previous prime is 393845640127. The next prime is 393845640163. The reversal of 393845640133 is 331046548393.

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 393845640133 - 2¹³ = 393845631941 is a prime.

It is a super-2 number, since 2×393845640133² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393845640113) 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, 17902074541 + ... + 17902074562.

It is an arithmetic number, because the mean of its divisors is an integer number (107412447312).

Almost surely, 2^393845640133 is an apocalyptic number.

It is an amenable number.

393845640133 is a deficient number, since it is larger than the sum of its proper divisors (35804149115).

393845640133 is a wasteful number, since it uses less digits than its factorization.

393845640133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35804149114.

The product of its (nonzero) digits is 2799360, while the sum is 49.

The spelling of 393845640133 in words is "three hundred ninety-three billion, eight hundred forty-five million, six hundred forty thousand, one hundred thirty-three".