138200081 has 2 divisors, whose sum is σ = 138200082. Its totient is φ = 138200080.

The previous prime is 138200059. The next prime is 138200087. The reversal of 138200081 is 180002831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107019025 + 31181056 = 10345^2 + 5584^2 .

It is a cyclic number.

It is not a de Polignac number, because 138200081 - 2¹⁴ = 138183697 is a prime.

It is a super-2 number, since 2×138200081² = 38198524776813122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138200087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69100040 + 69100041.

It is an arithmetic number, because the mean of its divisors is an integer number (69100041).

Almost surely, 2^138200081 is an apocalyptic number.

It is an amenable number.

138200081 is a deficient number, since it is larger than the sum of its proper divisors (1).

138200081 is an equidigital number, since it uses as much as digits as its factorization.

138200081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 138200081 is about 11755.8530528414. The cubic root of 138200081 is about 517.0145506320.

The spelling of 138200081 in words is "one hundred thirty-eight million, two hundred thousand, eighty-one".