438788690189 has 2 divisors, whose sum is σ = 438788690190. Its totient is φ = 438788690188.

The previous prime is 438788690183. The next prime is 438788690227. The reversal of 438788690189 is 981096887834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279174856900 + 159613833289 = 528370^2 + 399517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438788690189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438788690183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219394345094 + 219394345095.

It is an arithmetic number, because the mean of its divisors is an integer number (219394345095).

Almost surely, 2^438788690189 is an apocalyptic number.

It is an amenable number.

438788690189 is a deficient number, since it is larger than the sum of its proper divisors (1).

438788690189 is an equidigital number, since it uses as much as digits as its factorization.

438788690189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 167215104, while the sum is 71.

The spelling of 438788690189 in words is "four hundred thirty-eight billion, seven hundred eighty-eight million, six hundred ninety thousand, one hundred eighty-nine".