138277259 has 2 divisors, whose sum is σ = 138277260. Its totient is φ = 138277258.

The previous prime is 138277199. The next prime is 138277273. The reversal of 138277259 is 952772831.

It is a strong prime.

It is an emirp because it is prime and its reverse (952772831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138277259 - 2²⁰ = 137228683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138277289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69138629 + 69138630.

It is an arithmetic number, because the mean of its divisors is an integer number (69138630).

Almost surely, 2^138277259 is an apocalyptic number.

138277259 is a deficient number, since it is larger than the sum of its proper divisors (1).

138277259 is an equidigital number, since it uses as much as digits as its factorization.

138277259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 138277259 is about 11759.1351297619. The cubic root of 138277259 is about 517.1107751860.

It can be divided in two parts, 1382772 and 59, that added together give a palindrome (1382831).

The spelling of 138277259 in words is "one hundred thirty-eight million, two hundred seventy-seven thousand, two hundred fifty-nine".