384438281 has 2 divisors, whose sum is σ = 384438282. Its totient is φ = 384438280.

The previous prime is 384438227. The next prime is 384438283. The reversal of 384438281 is 182834483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 378108025 + 6330256 = 19445^2 + 2516^2 .

It is a cyclic number.

It is not a de Polignac number, because 384438281 - 2⁶ = 384438217 is a prime.

It is a super-2 number, since 2×384438281² = 295585583796469922, which contains 22 as substring.

Together with 384438283, 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 (384438283) 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, 192219140 + 192219141.

It is an arithmetic number, because the mean of its divisors is an integer number (192219141).

Almost surely, 2^384438281 is an apocalyptic number.

It is an amenable number.

384438281 is a deficient number, since it is larger than the sum of its proper divisors (1).

384438281 is an equidigital number, since it uses as much as digits as its factorization.

384438281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147456, while the sum is 41.

The square root of 384438281 is about 19607.0977199585. The cubic root of 384438281 is about 727.1246630449.

The spelling of 384438281 in words is "three hundred eighty-four million, four hundred thirty-eight thousand, two hundred eighty-one".