1887881601173 has 2 divisors, whose sum is σ = 1887881601174. Its totient is φ = 1887881601172.

The previous prime is 1887881601149. The next prime is 1887881601209. The reversal of 1887881601173 is 3711061887881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1818619467844 + 69262133329 = 1348562^2 + 263177^2 .

It is a cyclic number.

It is not a de Polignac number, because 1887881601173 - 2²⁶ = 1887814492309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1887881601673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 943940800586 + 943940800587.

It is an arithmetic number, because the mean of its divisors is an integer number (943940800587).

Almost surely, 2^{1887881601173} is an apocalyptic number.

It is an amenable number.

1887881601173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1887881601173 is an equidigital number, since it uses as much as digits as its factorization.

1887881601173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3612672, while the sum is 59.

The spelling of 1887881601173 in words is "one trillion, eight hundred eighty-seven billion, eight hundred eighty-one million, six hundred one thousand, one hundred seventy-three".