87827163689 has 2 divisors, whose sum is σ = 87827163690. Its totient is φ = 87827163688.

The previous prime is 87827163649. The next prime is 87827163763. The reversal of 87827163689 is 98636172878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78397200025 + 9429963664 = 279995^2 + 97108^2 .

It is a cyclic number.

It is not a de Polignac number, because 87827163689 - 2²⁸ = 87558728233 is a prime.

It is a super-2 number, since 2×87827163689² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87827163629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43913581844 + 43913581845.

It is an arithmetic number, because the mean of its divisors is an integer number (43913581845).

Almost surely, 2^87827163689 is an apocalyptic number.

It is an amenable number.

87827163689 is a deficient number, since it is larger than the sum of its proper divisors (1).

87827163689 is an equidigital number, since it uses as much as digits as its factorization.

87827163689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48771072, while the sum is 65.

The spelling of 87827163689 in words is "eighty-seven billion, eight hundred twenty-seven million, one hundred sixty-three thousand, six hundred eighty-nine".