389016997 has 2 divisors, whose sum is σ = 389016998. Its totient is φ = 389016996.

The previous prime is 389016989. The next prime is 389017007. The reversal of 389016997 is 799610983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388326436 + 690561 = 19706^2 + 831^2 .

It is a cyclic number.

It is not a de Polignac number, because 389016997 - 2³ = 389016989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389046997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194508498 + 194508499.

It is an arithmetic number, because the mean of its divisors is an integer number (194508499).

Almost surely, 2^389016997 is an apocalyptic number.

It is an amenable number.

389016997 is a deficient number, since it is larger than the sum of its proper divisors (1).

389016997 is an equidigital number, since it uses as much as digits as its factorization.

389016997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 389016997 is about 19723.5138096638. The cubic root of 389016997 is about 729.9999981235. Note that the first 5 decimals are identical.

The spelling of 389016997 in words is "three hundred eighty-nine million, sixteen thousand, nine hundred ninety-seven".