138180587 has 2 divisors, whose sum is σ = 138180588. Its totient is φ = 138180586.

The previous prime is 138180583. The next prime is 138180631. The reversal of 138180587 is 785081831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138180587 - 2² = 138180583 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138180583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69090293 + 69090294.

It is an arithmetic number, because the mean of its divisors is an integer number (69090294).

Almost surely, 2^138180587 is an apocalyptic number.

138180587 is a deficient number, since it is larger than the sum of its proper divisors (1).

138180587 is an equidigital number, since it uses as much as digits as its factorization.

138180587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 41.

The square root of 138180587 is about 11755.0239046971. The cubic root of 138180587 is about 516.9902400925.

The spelling of 138180587 in words is "one hundred thirty-eight million, one hundred eighty thousand, five hundred eighty-seven".