138173000087 has 2 divisors, whose sum is σ = 138173000088. Its totient is φ = 138173000086.

The previous prime is 138173000083. The next prime is 138173000137. The reversal of 138173000087 is 780000371831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138173000087 - 2² = 138173000083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138173000087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138173000083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69086500043 + 69086500044.

It is an arithmetic number, because the mean of its divisors is an integer number (69086500044).

Almost surely, 2^138173000087 is an apocalyptic number.

138173000087 is a deficient number, since it is larger than the sum of its proper divisors (1).

138173000087 is an equidigital number, since it uses as much as digits as its factorization.

138173000087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 138173000087 in words is "one hundred thirty-eight billion, one hundred seventy-three million, eighty-seven", and thus it is an aban number.