389436169 has 2 divisors, whose sum is σ = 389436170. Its totient is φ = 389436168.

The previous prime is 389436149. The next prime is 389436197. The reversal of 389436169 is 961634983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 294568569 + 94867600 = 17163^2 + 9740^2 .

It is a cyclic number.

It is not a de Polignac number, because 389436169 - 2¹⁵ = 389403401 is a prime.

It is a super-2 number, since 2×389436169² = 303321059450793122, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (389436149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194718084 + 194718085.

It is an arithmetic number, because the mean of its divisors is an integer number (194718085).

Almost surely, 2^389436169 is an apocalyptic number.

It is an amenable number.

389436169 is a deficient number, since it is larger than the sum of its proper divisors (1).

389436169 is an equidigital number, since it uses as much as digits as its factorization.

389436169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 49.

The square root of 389436169 is about 19734.1371486062. The cubic root of 389436169 is about 730.2620995417.

The spelling of 389436169 in words is "three hundred eighty-nine million, four hundred thirty-six thousand, one hundred sixty-nine".