138452507 has 2 divisors, whose sum is σ = 138452508. Its totient is φ = 138452506.

The previous prime is 138452453. The next prime is 138452533. The reversal of 138452507 is 705254831.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (705254831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138452507 - 2⁶ = 138452443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138452597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69226253 + 69226254.

It is an arithmetic number, because the mean of its divisors is an integer number (69226254).

Almost surely, 2^138452507 is an apocalyptic number.

138452507 is a deficient number, since it is larger than the sum of its proper divisors (1).

138452507 is an equidigital number, since it uses as much as digits as its factorization.

138452507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 138452507 is about 11766.5843387110. The cubic root of 138452507 is about 517.3291392966.

The spelling of 138452507 in words is "one hundred thirty-eight million, four hundred fifty-two thousand, five hundred seven".