389334779 has 2 divisors, whose sum is σ = 389334780. Its totient is φ = 389334778.

The previous prime is 389334763. The next prime is 389334839. The reversal of 389334779 is 977433983.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 389334779 - 2⁴ = 389334763 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389334779.

It is not a weakly prime, because it can be changed into another prime (389334709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194667389 + 194667390.

It is an arithmetic number, because the mean of its divisors is an integer number (194667390).

Almost surely, 2^389334779 is an apocalyptic number.

389334779 is a deficient number, since it is larger than the sum of its proper divisors (1).

389334779 is an equidigital number, since it uses as much as digits as its factorization.

389334779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 53.

The square root of 389334779 is about 19731.5680826436. The cubic root of 389334779 is about 730.1987192785.

The spelling of 389334779 in words is "three hundred eighty-nine million, three hundred thirty-four thousand, seven hundred seventy-nine".