389385949 has 2 divisors, whose sum is σ = 389385950. Its totient is φ = 389385948.

The previous prime is 389385907. The next prime is 389385959. The reversal of 389385949 is 949583983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388365849 + 1020100 = 19707^2 + 1010^2 .

It is an emirp because it is prime and its reverse (949583983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389385949 - 2¹⁹ = 388861661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 389385893 and 389385902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389385959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194692974 + 194692975.

It is an arithmetic number, because the mean of its divisors is an integer number (194692975).

Almost surely, 2^389385949 is an apocalyptic number.

It is an amenable number.

389385949 is a deficient number, since it is larger than the sum of its proper divisors (1).

389385949 is an equidigital number, since it uses as much as digits as its factorization.

389385949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 58.

The square root of 389385949 is about 19732.8646931965. The cubic root of 389385949 is about 730.2307077142.

The spelling of 389385949 in words is "three hundred eighty-nine million, three hundred eighty-five thousand, nine hundred forty-nine".