138312259 has 2 divisors, whose sum is σ = 138312260. Its totient is φ = 138312258.

The previous prime is 138312247. The next prime is 138312263. The reversal of 138312259 is 952213831.

138312259 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138312259 - 2¹⁷ = 138181187 is a prime.

It is not a weakly prime, because it can be changed into another prime (138312269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69156129 + 69156130.

It is an arithmetic number, because the mean of its divisors is an integer number (69156130).

Almost surely, 2^138312259 is an apocalyptic number.

138312259 is a deficient number, since it is larger than the sum of its proper divisors (1).

138312259 is an equidigital number, since it uses as much as digits as its factorization.

138312259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 138312259 is about 11760.6232402879. The cubic root of 138312259 is about 517.1544009431.

The spelling of 138312259 in words is "one hundred thirty-eight million, three hundred twelve thousand, two hundred fifty-nine".