138283841 has 2 divisors, whose sum is σ = 138283842. Its totient is φ = 138283840.

The previous prime is 138283813. The next prime is 138283903. The reversal of 138283841 is 148382831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103225600 + 35058241 = 10160^2 + 5921^2 .

It is an emirp because it is prime and its reverse (148382831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138283841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138283795 and 138283804.

It is not a weakly prime, because it can be changed into another prime (138283801) 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, 69141920 + 69141921.

It is an arithmetic number, because the mean of its divisors is an integer number (69141921).

Almost surely, 2^138283841 is an apocalyptic number.

It is an amenable number.

138283841 is a deficient number, since it is larger than the sum of its proper divisors (1).

138283841 is an equidigital number, since it uses as much as digits as its factorization.

138283841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 38.

The square root of 138283841 is about 11759.4149939527. The cubic root of 138283841 is about 517.1189798832.

The spelling of 138283841 in words is "one hundred thirty-eight million, two hundred eighty-three thousand, eight hundred forty-one".