389864471 has 2 divisors, whose sum is σ = 389864472. Its totient is φ = 389864470.

The previous prime is 389864459. The next prime is 389864521. The reversal of 389864471 is 174468983.

It is an a-pointer prime, because the next prime (389864521) can be obtained adding 389864471 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 389864471 - 2¹⁴ = 389848087 is a prime.

It is a super-3 number, since 3×389864471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389864071) 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, 194932235 + 194932236.

It is an arithmetic number, because the mean of its divisors is an integer number (194932236).

Almost surely, 2^389864471 is an apocalyptic number.

389864471 is a deficient number, since it is larger than the sum of its proper divisors (1).

389864471 is an equidigital number, since it uses as much as digits as its factorization.

389864471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 50.

The square root of 389864471 is about 19744.9859711269. The cubic root of 389864471 is about 730.5297156067.

The spelling of 389864471 in words is "three hundred eighty-nine million, eight hundred sixty-four thousand, four hundred seventy-one".