389226779 has 2 divisors, whose sum is σ = 389226780. Its totient is φ = 389226778.

The previous prime is 389226737. The next prime is 389226797. The reversal of 389226779 is 977622983.

Together with next prime (389226797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389226779 - 2²⁸ = 120791323 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 389226779.

It is not a weakly prime, because it can be changed into another prime (389226479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194613389 + 194613390.

It is an arithmetic number, because the mean of its divisors is an integer number (194613390).

Almost surely, 2^389226779 is an apocalyptic number.

389226779 is a deficient number, since it is larger than the sum of its proper divisors (1).

389226779 is an equidigital number, since it uses as much as digits as its factorization.

389226779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 53.

The square root of 389226779 is about 19728.8311615260. The cubic root of 389226779 is about 730.1311949104.

The spelling of 389226779 in words is "three hundred eighty-nine million, two hundred twenty-six thousand, seven hundred seventy-nine".