87816794113 has 2 divisors, whose sum is σ = 87816794114. Its totient is φ = 87816794112.

The previous prime is 87816794111. The next prime is 87816794137. The reversal of 87816794113 is 31149761878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87114703104 + 702091009 = 295152^2 + 26497^2 .

It is a cyclic number.

It is not a de Polignac number, because 87816794113 - 2¹ = 87816794111 is a prime.

Together with 87816794111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (87816794111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43908397056 + 43908397057.

It is an arithmetic number, because the mean of its divisors is an integer number (43908397057).

Almost surely, 2^87816794113 is an apocalyptic number.

It is an amenable number.

87816794113 is a deficient number, since it is larger than the sum of its proper divisors (1).

87816794113 is an equidigital number, since it uses as much as digits as its factorization.

87816794113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 55.

The spelling of 87816794113 in words is "eighty-seven billion, eight hundred sixteen million, seven hundred ninety-four thousand, one hundred thirteen".