383869785909 has 4 divisors (see below), whose sum is σ = 511826381216. Its totient is φ = 255913190604.

The previous prime is 383869785883. The next prime is 383869785911. The reversal of 383869785909 is 909587968383.

It is a happy number.

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 not a de Polignac number, because 383869785909 - 2⁵ = 383869785877 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 (383869785979) 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, 63978297649 + ... + 63978297654.

It is an arithmetic number, because the mean of its divisors is an integer number (127956595304).

Almost surely, 2^383869785909 is an apocalyptic number.

It is an amenable number.

383869785909 is a deficient number, since it is larger than the sum of its proper divisors (127956595307).

383869785909 is a wasteful number, since it uses less digits than its factorization.

383869785909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127956595306.

The product of its (nonzero) digits is 705438720, while the sum is 75.

The spelling of 383869785909 in words is "three hundred eighty-three billion, eight hundred sixty-nine million, seven hundred eighty-five thousand, nine hundred nine".