138456061 has 2 divisors, whose sum is σ = 138456062. Its totient is φ = 138456060.

The previous prime is 138456053. The next prime is 138456119. The reversal of 138456061 is 160654831.

It is a happy number.

138456061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75951225 + 62504836 = 8715^2 + 7906^2 .

It is a cyclic number.

It is not a de Polignac number, because 138456061 - 2³ = 138456053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138456011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69228030 + 69228031.

It is an arithmetic number, because the mean of its divisors is an integer number (69228031).

Almost surely, 2^138456061 is an apocalyptic number.

It is an amenable number.

138456061 is a deficient number, since it is larger than the sum of its proper divisors (1).

138456061 is an equidigital number, since it uses as much as digits as its factorization.

138456061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 138456061 is about 11766.7353586286. The cubic root of 138456061 is about 517.3335657773. Note that the first 3 decimals are identical.

The spelling of 138456061 in words is "one hundred thirty-eight million, four hundred fifty-six thousand, sixty-one".