138277717 has 2 divisors, whose sum is σ = 138277718. Its totient is φ = 138277716.

The previous prime is 138277703. The next prime is 138277759. The reversal of 138277717 is 717772831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121022001 + 17255716 = 11001^2 + 4154^2 .

It is a cyclic number.

It is not a de Polignac number, because 138277717 - 2⁷ = 138277589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138271717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69138858 + 69138859.

It is an arithmetic number, because the mean of its divisors is an integer number (69138859).

Almost surely, 2^138277717 is an apocalyptic number.

It is an amenable number.

138277717 is a deficient number, since it is larger than the sum of its proper divisors (1).

138277717 is an equidigital number, since it uses as much as digits as its factorization.

138277717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115248, while the sum is 43.

The square root of 138277717 is about 11759.1546039671. The cubic root of 138277717 is about 517.1113461078. Note that the first 3 decimals are identical.

The spelling of 138277717 in words is "one hundred thirty-eight million, two hundred seventy-seven thousand, seven hundred seventeen".