438986281 has 2 divisors, whose sum is σ = 438986282. Its totient is φ = 438986280.

The previous prime is 438986201. The next prime is 438986341. The reversal of 438986281 is 182689834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 438483600 + 502681 = 20940^2 + 709^2 .

It is a cyclic number.

It is not a de Polignac number, because 438986281 - 2⁷ = 438986153 is a prime.

It is a super-2 number, since 2×438986281² = 385417909812421922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (438986201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219493140 + 219493141.

It is an arithmetic number, because the mean of its divisors is an integer number (219493141).

Almost surely, 2^438986281 is an apocalyptic number.

It is an amenable number.

438986281 is a deficient number, since it is larger than the sum of its proper divisors (1).

438986281 is an equidigital number, since it uses as much as digits as its factorization.

438986281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 49.

The square root of 438986281 is about 20951.9994511264. Note that the first 3 decimals coincide. The cubic root of 438986281 is about 760.0059331254.

The spelling of 438986281 in words is "four hundred thirty-eight million, nine hundred eighty-six thousand, two hundred eighty-one".