138147985350187 has 2 divisors, whose sum is σ = 138147985350188. Its totient is φ = 138147985350186.

The previous prime is 138147985350101. The next prime is 138147985350227. The reversal of 138147985350187 is 781053589741831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138147985350187 is a prime.

It is not a weakly prime, because it can be changed into another prime (138147985350787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69073992675093 + 69073992675094.

It is an arithmetic number, because the mean of its divisors is an integer number (69073992675094).

Almost surely, 2^{138147985350187} is an apocalyptic number.

138147985350187 is a deficient number, since it is larger than the sum of its proper divisors (1).

138147985350187 is an equidigital number, since it uses as much as digits as its factorization.

138147985350187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 203212800, while the sum is 70.

The spelling of 138147985350187 in words is "one hundred thirty-eight trillion, one hundred forty-seven billion, nine hundred eighty-five million, three hundred fifty thousand, one hundred eighty-seven".