438986161 has 2 divisors, whose sum is σ = 438986162. Its totient is φ = 438986160.

The previous prime is 438986159. The next prime is 438986201. The reversal of 438986161 is 161689834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427042225 + 11943936 = 20665^2 + 3456^2 .

It is a cyclic number.

It is not a de Polignac number, because 438986161 - 2¹ = 438986159 is a prime.

Together with 438986159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (438986131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219493080 + 219493081.

It is an arithmetic number, because the mean of its divisors is an integer number (219493081).

Almost surely, 2^438986161 is an apocalyptic number.

It is an amenable number.

438986161 is a deficient number, since it is larger than the sum of its proper divisors (1).

438986161 is an equidigital number, since it uses as much as digits as its factorization.

438986161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 438986161 is about 20951.9965874377. The cubic root of 438986161 is about 760.0058638744.

The spelling of 438986161 in words is "four hundred thirty-eight million, nine hundred eighty-six thousand, one hundred sixty-one".