3938652281 has 2 divisors, whose sum is σ = 3938652282. Its totient is φ = 3938652280.

The previous prime is 3938652251. The next prime is 3938652283. The reversal of 3938652281 is 1822568393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3363420025 + 575232256 = 57995^2 + 23984^2 .

It is a cyclic number.

It is not a de Polignac number, because 3938652281 - 2¹⁰ = 3938651257 is a prime.

It is a super-2 number, since 2×3938652281² = 31025963581253005922, which contains 22 as substring.

Together with 3938652283, 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 (3938652283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969326140 + 1969326141.

It is an arithmetic number, because the mean of its divisors is an integer number (1969326141).

Almost surely, 2^3938652281 is an apocalyptic number.

It is an amenable number.

3938652281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3938652281 is an equidigital number, since it uses as much as digits as its factorization.

3938652281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 47.

The square root of 3938652281 is about 62758.6829132033. The cubic root of 3938652281 is about 1579.2439208172.

The spelling of 3938652281 in words is "three billion, nine hundred thirty-eight million, six hundred fifty-two thousand, two hundred eighty-one".