383999389 has 8 divisors (see below), whose sum is σ = 386301920. Its totient is φ = 381704400.

The previous prime is 383999339. The next prime is 383999419. The reversal of 383999389 is 983999383.

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

It is a cyclic number.

It is not a de Polignac number, because 383999389 - 2²⁷ = 249781661 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 (383999309) 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, 123919 + ... + 126979.

It is an arithmetic number, because the mean of its divisors is an integer number (48287740).

Almost surely, 2^383999389 is an apocalyptic number.

It is an amenable number.

383999389 is a deficient number, since it is larger than the sum of its proper divisors (2302531).

383999389 is a wasteful number, since it uses less digits than its factorization.

383999389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771.

The product of its digits is 11337408, while the sum is 61.

The square root of 383999389 is about 19595.9023522776. The cubic root of 383999389 is about 726.8478516255.

The spelling of 383999389 in words is "three hundred eighty-three million, nine hundred ninety-nine thousand, three hundred eighty-nine".