138452207 has 2 divisors, whose sum is σ = 138452208. Its totient is φ = 138452206.

The previous prime is 138452189. The next prime is 138452219. The reversal of 138452207 is 702254831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138452207 - 2⁶ = 138452143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138452507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69226103 + 69226104.

It is an arithmetic number, because the mean of its divisors is an integer number (69226104).

Almost surely, 2^138452207 is an apocalyptic number.

138452207 is a deficient number, since it is larger than the sum of its proper divisors (1).

138452207 is an equidigital number, since it uses as much as digits as its factorization.

138452207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 138452207 is about 11766.5715907396. The cubic root of 138452207 is about 517.3287656454.

The spelling of 138452207 in words is "one hundred thirty-eight million, four hundred fifty-two thousand, two hundred seven".