87847771073 has 2 divisors, whose sum is σ = 87847771074. Its totient is φ = 87847771072.

The previous prime is 87847771057. The next prime is 87847771127. The reversal of 87847771073 is 37017774878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87822137104 + 25633969 = 296348^2 + 5063^2 .

It is a cyclic number.

It is not a de Polignac number, because 87847771073 - 2⁴ = 87847771057 is a prime.

It is not a weakly prime, because it can be changed into another prime (87847771003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43923885536 + 43923885537.

It is an arithmetic number, because the mean of its divisors is an integer number (43923885537).

Almost surely, 2^87847771073 is an apocalyptic number.

It is an amenable number.

87847771073 is a deficient number, since it is larger than the sum of its proper divisors (1).

87847771073 is an equidigital number, since it uses as much as digits as its factorization.

87847771073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12907776, while the sum is 59.

The spelling of 87847771073 in words is "eighty-seven billion, eight hundred forty-seven million, seven hundred seventy-one thousand, seventy-three".