138255701 has 2 divisors, whose sum is σ = 138255702. Its totient is φ = 138255700.

The previous prime is 138255683. The next prime is 138255739. The reversal of 138255701 is 107552831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132135025 + 6120676 = 11495^2 + 2474^2 .

It is an emirp because it is prime and its reverse (107552831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138255701 is a prime.

It is a super-2 number, since 2×138255701² = 38229277718002802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138225701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69127850 + 69127851.

It is an arithmetic number, because the mean of its divisors is an integer number (69127851).

Almost surely, 2^138255701 is an apocalyptic number.

It is an amenable number.

138255701 is a deficient number, since it is larger than the sum of its proper divisors (1).

138255701 is an equidigital number, since it uses as much as digits as its factorization.

138255701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 138255701 is about 11758.2184449856. The cubic root of 138255701 is about 517.0839005489.

The spelling of 138255701 in words is "one hundred thirty-eight million, two hundred fifty-five thousand, seven hundred one".