1138139173 has 2 divisors, whose sum is σ = 1138139174. Its totient is φ = 1138139172.

The previous prime is 1138139161. The next prime is 1138139207. The reversal of 1138139173 is 3719318311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1076955489 + 61183684 = 32817^2 + 7822^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138139173 - 2⁵ = 1138139141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1138139143) 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, 569069586 + 569069587.

It is an arithmetic number, because the mean of its divisors is an integer number (569069587).

Almost surely, 2^1138139173 is an apocalyptic number.

It is an amenable number.

1138139173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138139173 is an equidigital number, since it uses as much as digits as its factorization.

1138139173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 1138139173 is about 33736.3183083157. The cubic root of 1138139173 is about 1044.0752249906.

The spelling of 1138139173 in words is "one billion, one hundred thirty-eight million, one hundred thirty-nine thousand, one hundred seventy-three".