138831283 has 2 divisors, whose sum is σ = 138831284. Its totient is φ = 138831282.

The previous prime is 138831263. The next prime is 138831293. The reversal of 138831283 is 382138831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138831283 is a prime.

It is not a weakly prime, because it can be changed into another prime (138831263) 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, 69415641 + 69415642.

It is an arithmetic number, because the mean of its divisors is an integer number (69415642).

Almost surely, 2^138831283 is an apocalyptic number.

138831283 is a deficient number, since it is larger than the sum of its proper divisors (1).

138831283 is an equidigital number, since it uses as much as digits as its factorization.

138831283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 37.

The square root of 138831283 is about 11782.6687554221. The cubic root of 138831283 is about 517.8004764685.

The spelling of 138831283 in words is "one hundred thirty-eight million, eight hundred thirty-one thousand, two hundred eighty-three".