87081328273 has 2 divisors, whose sum is σ = 87081328274. Its totient is φ = 87081328272.

The previous prime is 87081328259. The next prime is 87081328331. The reversal of 87081328273 is 37282318078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44730981009 + 42350347264 = 211497^2 + 205792^2 .

It is a cyclic number.

It is not a de Polignac number, because 87081328273 - 2⁹ = 87081327761 is a prime.

It is not a weakly prime, because it can be changed into another prime (87081328073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43540664136 + 43540664137.

It is an arithmetic number, because the mean of its divisors is an integer number (43540664137).

Almost surely, 2^87081328273 is an apocalyptic number.

It is an amenable number.

87081328273 is a deficient number, since it is larger than the sum of its proper divisors (1).

87081328273 is an equidigital number, since it uses as much as digits as its factorization.

87081328273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 87081328273 in words is "eighty-seven billion, eighty-one million, three hundred twenty-eight thousand, two hundred seventy-three".