389334749 has 2 divisors, whose sum is σ = 389334750. Its totient is φ = 389334748.

The previous prime is 389334739. The next prime is 389334761. The reversal of 389334749 is 947433983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 347822500 + 41512249 = 18650^2 + 6443^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389334749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 389334697 and 389334706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389334709) 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 as a sum of consecutive naturals, namely, 194667374 + 194667375.

It is an arithmetic number, because the mean of its divisors is an integer number (194667375).

Almost surely, 2^389334749 is an apocalyptic number.

It is an amenable number.

389334749 is a deficient number, since it is larger than the sum of its proper divisors (1).

389334749 is an equidigital number, since it uses as much as digits as its factorization.

389334749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 50.

The square root of 389334749 is about 19731.5673224405. The cubic root of 389334749 is about 730.1987005234.

The spelling of 389334749 in words is "three hundred eighty-nine million, three hundred thirty-four thousand, seven hundred forty-nine".