383969943 has 16 divisors (see below), whose sum is σ = 650108160. Its totient is φ = 219411288.

The previous prime is 383969899. The next prime is 383969953. The reversal of 383969943 is 349969383.

It is a happy number.

It is not a de Polignac number, because 383969943 - 2⁸ = 383969687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 383969943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383969953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1015605 + ... + 1015982.

It is an arithmetic number, because the mean of its divisors is an integer number (40631760).

Almost surely, 2^383969943 is an apocalyptic number.

383969943 is a deficient number, since it is larger than the sum of its proper divisors (266138217).

383969943 is a wasteful number, since it uses less digits than its factorization.

383969943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031603 (or 2031597 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 54.

The square root of 383969943 is about 19595.1510073283. The cubic root of 383969943 is about 726.8292723347.

The spelling of 383969943 in words is "three hundred eighty-three million, nine hundred sixty-nine thousand, nine hundred forty-three".