1361328173 has 2 divisors, whose sum is σ = 1361328174. Its totient is φ = 1361328172.

The previous prime is 1361328139. The next prime is 1361328187. The reversal of 1361328173 is 3718231631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 852464809 + 508863364 = 29197^2 + 22558^2 .

It is a cyclic number.

It is not a de Polignac number, because 1361328173 - 2⁶ = 1361328109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361328973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680664086 + 680664087.

It is an arithmetic number, because the mean of its divisors is an integer number (680664087).

Almost surely, 2^1361328173 is an apocalyptic number.

It is an amenable number.

1361328173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361328173 is an equidigital number, since it uses as much as digits as its factorization.

1361328173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 1361328173 is about 36896.1810083374. The cubic root of 1361328173 is about 1108.2922018743.

The spelling of 1361328173 in words is "one billion, three hundred sixty-one million, three hundred twenty-eight thousand, one hundred seventy-three".