438705161 has 2 divisors, whose sum is σ = 438705162. Its totient is φ = 438705160.

The previous prime is 438705143. The next prime is 438705181. The reversal of 438705161 is 161507834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417957136 + 20748025 = 20444^2 + 4555^2 .

It is a cyclic number.

It is not a de Polignac number, because 438705161 - 2¹⁰ = 438704137 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (438705131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219352580 + 219352581.

It is an arithmetic number, because the mean of its divisors is an integer number (219352581).

Almost surely, 2^438705161 is an apocalyptic number.

It is an amenable number.

438705161 is a deficient number, since it is larger than the sum of its proper divisors (1).

438705161 is an equidigital number, since it uses as much as digits as its factorization.

438705161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 438705161 is about 20945.2897091446. The cubic root of 438705161 is about 759.8436664821.

The spelling of 438705161 in words is "four hundred thirty-eight million, seven hundred five thousand, one hundred sixty-one".