389178241 has 2 divisors, whose sum is σ = 389178242. Its totient is φ = 389178240.

The previous prime is 389178233. The next prime is 389178301. The reversal of 389178241 is 142871983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334121841 + 55056400 = 18279^2 + 7420^2 .

It is an emirp because it is prime and its reverse (142871983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389178241 - 2³ = 389178233 is a prime.

It is not a weakly prime, because it can be changed into another prime (389178211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194589120 + 194589121.

It is an arithmetic number, because the mean of its divisors is an integer number (194589121).

Almost surely, 2^389178241 is an apocalyptic number.

It is an amenable number.

389178241 is a deficient number, since it is larger than the sum of its proper divisors (1).

389178241 is an equidigital number, since it uses as much as digits as its factorization.

389178241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 389178241 is about 19727.6009945457. The cubic root of 389178241 is about 730.1008436404.

The spelling of 389178241 in words is "three hundred eighty-nine million, one hundred seventy-eight thousand, two hundred forty-one".