87106720277 has 2 divisors, whose sum is σ = 87106720278. Its totient is φ = 87106720276.

The previous prime is 87106720157. The next prime is 87106720339. The reversal of 87106720277 is 77202760178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58896494596 + 28210225681 = 242686^2 + 167959^2 .

It is a cyclic number.

It is not a de Polignac number, because 87106720277 - 2¹² = 87106716181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87106728277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43553360138 + 43553360139.

It is an arithmetic number, because the mean of its divisors is an integer number (43553360139).

Almost surely, 2^87106720277 is an apocalyptic number.

It is an amenable number.

87106720277 is a deficient number, since it is larger than the sum of its proper divisors (1).

87106720277 is an equidigital number, since it uses as much as digits as its factorization.

87106720277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460992, while the sum is 47.

The spelling of 87106720277 in words is "eighty-seven billion, one hundred six million, seven hundred twenty thousand, two hundred seventy-seven".