4138408189 has 2 divisors, whose sum is σ = 4138408190. Its totient is φ = 4138408188.

The previous prime is 4138408187. The next prime is 4138408201. The reversal of 4138408189 is 9818048314.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2071160100 + 2067248089 = 45510^2 + 45467^2 .

It is a cyclic number.

It is not a de Polignac number, because 4138408189 - 2¹ = 4138408187 is a prime.

Together with 4138408187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4138408187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069204094 + 2069204095.

It is an arithmetic number, because the mean of its divisors is an integer number (2069204095).

Almost surely, 2^4138408189 is an apocalyptic number.

It is an amenable number.

4138408189 is a deficient number, since it is larger than the sum of its proper divisors (1).

4138408189 is an equidigital number, since it uses as much as digits as its factorization.

4138408189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 46.

The square root of 4138408189 is about 64330.4608175629. The cubic root of 4138408189 is about 1605.5029513650.

It can be divided in two parts, 41 and 38408189, that added together give a triangular number (38408230 = T₈₇₆₄).

The spelling of 4138408189 in words is "four billion, one hundred thirty-eight million, four hundred eight thousand, one hundred eighty-nine".