389545979 has 2 divisors, whose sum is σ = 389545980. Its totient is φ = 389545978.

The previous prime is 389545967. The next prime is 389545993. The reversal of 389545979 is 979545983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 389545979 - 2²⁸ = 121110523 is a prime.

It is a super-4 number, since 4×389545979⁴ (a number of 35 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (389545909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194772989 + 194772990.

It is an arithmetic number, because the mean of its divisors is an integer number (194772990).

Almost surely, 2^389545979 is an apocalyptic number.

389545979 is a deficient number, since it is larger than the sum of its proper divisors (1).

389545979 is an equidigital number, since it uses as much as digits as its factorization.

389545979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12247200, while the sum is 59.

The square root of 389545979 is about 19736.9191871477. The cubic root of 389545979 is about 730.3307308534.

The spelling of 389545979 in words is "three hundred eighty-nine million, five hundred forty-five thousand, nine hundred seventy-nine".