438383135081 has 2 divisors, whose sum is σ = 438383135082. Its totient is φ = 438383135080.

The previous prime is 438383135017. The next prime is 438383135083. The reversal of 438383135081 is 180531383834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422121784681 + 16261350400 = 649709^2 + 127520^2 .

It is a cyclic number.

It is not a de Polignac number, because 438383135081 - 2⁶ = 438383135017 is a prime.

It is a super-2 number, since 2×438383135081² (a number of 24 digits) contains 22 as substring.

Together with 438383135083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (438383135083) 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, 219191567540 + 219191567541.

It is an arithmetic number, because the mean of its divisors is an integer number (219191567541).

Almost surely, 2^438383135081 is an apocalyptic number.

It is an amenable number.

438383135081 is a deficient number, since it is larger than the sum of its proper divisors (1).

438383135081 is an equidigital number, since it uses as much as digits as its factorization.

438383135081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 438383135081 in words is "four hundred thirty-eight billion, three hundred eighty-three million, one hundred thirty-five thousand, eighty-one".