87668193761273 has 2 divisors, whose sum is σ = 87668193761274. Its totient is φ = 87668193761272.

The previous prime is 87668193761237. The next prime is 87668193761287. The reversal of 87668193761273 is 37216739186678.

Together with previous prime (87668193761237) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81736299700969 + 5931894060304 = 9040813^2 + 2435548^2 .

It is a cyclic number.

It is not a de Polignac number, because 87668193761273 - 2²⁰ = 87668192712697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87668193761273.

It is not a weakly prime, because it can be changed into another prime (87668193791273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43834096880636 + 43834096880637.

It is an arithmetic number, because the mean of its divisors is an integer number (43834096880637).

Almost surely, 2^{87668193761273} is an apocalyptic number.

It is an amenable number.

87668193761273 is a deficient number, since it is larger than the sum of its proper divisors (1).

87668193761273 is an equidigital number, since it uses as much as digits as its factorization.

87668193761273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768144384, while the sum is 74.

The spelling of 87668193761273 in words is "eighty-seven trillion, six hundred sixty-eight billion, one hundred ninety-three million, seven hundred sixty-one thousand, two hundred seventy-three".