389689634 has 4 divisors (see below), whose sum is σ = 584534454. Its totient is φ = 194844816.

The previous prime is 389689609. The next prime is 389689649. The reversal of 389689634 is 436986983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 436986983 = 37 ⋅11810459.

It can be written as a sum of positive squares in only one way, i.e., 376476409 + 13213225 = 19403^2 + 3635^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 389689634.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97422407 + ... + 97422410.

Almost surely, 2^389689634 is an apocalyptic number.

389689634 is a deficient number, since it is larger than the sum of its proper divisors (194844820).

389689634 is a wasteful number, since it uses less digits than its factorization.

389689634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194844819.

The product of its digits is 6718464, while the sum is 56.

The square root of 389689634 is about 19740.5580974804. The cubic root of 389689634 is about 730.4204958385.

The spelling of 389689634 in words is "three hundred eighty-nine million, six hundred eighty-nine thousand, six hundred thirty-four".