138110857 has 2 divisors, whose sum is σ = 138110858. Its totient is φ = 138110856.

The previous prime is 138110827. The next prime is 138110887. The reversal of 138110857 is 758011831.

138110857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (138110827) and next prime (138110887).

It can be written as a sum of positive squares in only one way, i.e., 135932281 + 2178576 = 11659^2 + 1476^2 .

It is a cyclic number.

It is not a de Polignac number, because 138110857 - 2⁷ = 138110729 is a prime.

It is not a weakly prime, because it can be changed into another prime (138110807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69055428 + 69055429.

It is an arithmetic number, because the mean of its divisors is an integer number (69055429).

Almost surely, 2^138110857 is an apocalyptic number.

It is an amenable number.

138110857 is a deficient number, since it is larger than the sum of its proper divisors (1).

138110857 is an equidigital number, since it uses as much as digits as its factorization.

138110857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 34.

The square root of 138110857 is about 11752.0575645289. The cubic root of 138110857 is about 516.9032626189.

The spelling of 138110857 in words is "one hundred thirty-eight million, one hundred ten thousand, eight hundred fifty-seven".