389734388187 has 4 divisors (see below), whose sum is σ = 519645850920. Its totient is φ = 259822925456.

The previous prime is 389734388167. The next prime is 389734388203. The reversal of 389734388187 is 781883437983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781883437983 = 3 ⋅260627812661.

It is a cyclic number.

It is not a de Polignac number, because 389734388187 - 2¹⁸ = 389734126043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (389734388167) 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, 64955731362 + ... + 64955731367.

It is an arithmetic number, because the mean of its divisors is an integer number (129911462730).

Almost surely, 2^389734388187 is an apocalyptic number.

389734388187 is a deficient number, since it is larger than the sum of its proper divisors (129911462733).

389734388187 is a wasteful number, since it uses less digits than its factorization.

389734388187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129911462732.

The product of its digits is 195084288, while the sum is 69.

The spelling of 389734388187 in words is "three hundred eighty-nine billion, seven hundred thirty-four million, three hundred eighty-eight thousand, one hundred eighty-seven".