138266099 has 2 divisors, whose sum is σ = 138266100. Its totient is φ = 138266098.

The previous prime is 138266047. The next prime is 138266119. The reversal of 138266099 is 990662831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138266099 - 2⁸ = 138265843 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138266399) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69133049 + 69133050.

It is an arithmetic number, because the mean of its divisors is an integer number (69133050).

Almost surely, 2^138266099 is an apocalyptic number.

138266099 is a deficient number, since it is larger than the sum of its proper divisors (1).

138266099 is an equidigital number, since it uses as much as digits as its factorization.

138266099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 138266099 is about 11758.6605954930. The cubic root of 138266099 is about 517.0968632539.

The spelling of 138266099 in words is "one hundred thirty-eight million, two hundred sixty-six thousand, ninety-nine".