389187069 has 16 divisors (see below), whose sum is σ = 558757440. Its totient is φ = 240055040.

The previous prime is 389187067. The next prime is 389187157. The reversal of 389187069 is 960781983.

It is a cyclic number.

It is not a de Polignac number, because 389187069 - 2¹ = 389187067 is a prime.

It is a super-2 number, since 2×389187069² = 302933149353621522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389187067) 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, 61662 + ... + 67679.

It is an arithmetic number, because the mean of its divisors is an integer number (34922340).

Almost surely, 2^389187069 is an apocalyptic number.

It is an amenable number.

389187069 is a deficient number, since it is larger than the sum of its proper divisors (169570371).

389187069 is a wasteful number, since it uses less digits than its factorization.

389187069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129420.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 389187069 is about 19727.8247407057. The cubic root of 389187069 is about 730.1063640599.

The spelling of 389187069 in words is "three hundred eighty-nine million, one hundred eighty-seven thousand, sixty-nine".