389385961 has 2 divisors, whose sum is σ = 389385962. Its totient is φ = 389385960.

The previous prime is 389385959. The next prime is 389386013. The reversal of 389385961 is 169583983.

It is an a-pointer prime, because the next prime (389386013) can be obtained adding 389385961 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339259561 + 50126400 = 18419^2 + 7080^2 .

It is an emirp because it is prime and its reverse (169583983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389385961 - 2¹ = 389385959 is a prime.

Together with 389385959, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 389385899 and 389385908.

It is not a weakly prime, because it can be changed into another prime (389383961) 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, 194692980 + 194692981.

It is an arithmetic number, because the mean of its divisors is an integer number (194692981).

Almost surely, 2^389385961 is an apocalyptic number.

It is an amenable number.

389385961 is a deficient number, since it is larger than the sum of its proper divisors (1).

389385961 is an equidigital number, since it uses as much as digits as its factorization.

389385961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 52.

The square root of 389385961 is about 19732.8649972577. The cubic root of 389385961 is about 730.2307152155.

The spelling of 389385961 in words is "three hundred eighty-nine million, three hundred eighty-five thousand, nine hundred sixty-one".