389738409 has 4 divisors (see below), whose sum is σ = 519651216. Its totient is φ = 259825604.

The previous prime is 389738359. The next prime is 389738423. The reversal of 389738409 is 904837983.

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 389738409 - 2¹⁹ = 389214121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (389738449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64956399 + ... + 64956404.

It is an arithmetic number, because the mean of its divisors is an integer number (129912804).

Almost surely, 2^389738409 is an apocalyptic number.

It is an amenable number.

389738409 is a deficient number, since it is larger than the sum of its proper divisors (129912807).

389738409 is a wasteful number, since it uses less digits than its factorization.

389738409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129912806.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 389738409 is about 19741.7934595619. The cubic root of 389738409 is about 730.4509686133.

The spelling of 389738409 in words is "three hundred eighty-nine million, seven hundred thirty-eight thousand, four hundred nine".