389318617 has 2 divisors, whose sum is σ = 389318618. Its totient is φ = 389318616.

The previous prime is 389318593. The next prime is 389318623. The reversal of 389318617 is 716813983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359898841 + 29419776 = 18971^2 + 5424^2 .

It is an emirp because it is prime and its reverse (716813983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389318617 - 2¹⁵ = 389285849 is a prime.

It is a super-3 number, since 3×389318617³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (389316617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194659308 + 194659309.

It is an arithmetic number, because the mean of its divisors is an integer number (194659309).

Almost surely, 2^389318617 is an apocalyptic number.

It is an amenable number.

389318617 is a deficient number, since it is larger than the sum of its proper divisors (1).

389318617 is an equidigital number, since it uses as much as digits as its factorization.

389318617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 389318617 is about 19731.1585316220. The cubic root of 389318617 is about 730.1886151764.

The spelling of 389318617 in words is "three hundred eighty-nine million, three hundred eighteen thousand, six hundred seventeen".