87008005771 has 2 divisors, whose sum is σ = 87008005772. Its totient is φ = 87008005770.

The previous prime is 87008005723. The next prime is 87008005783. The reversal of 87008005771 is 17750080078.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87008005771 is a prime.

It is not a weakly prime, because it can be changed into another prime (87008000771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43504002885 + 43504002886.

It is an arithmetic number, because the mean of its divisors is an integer number (43504002886).

Almost surely, 2^87008005771 is an apocalyptic number.

87008005771 is a deficient number, since it is larger than the sum of its proper divisors (1).

87008005771 is an equidigital number, since it uses as much as digits as its factorization.

87008005771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109760, while the sum is 43.

The spelling of 87008005771 in words is "eighty-seven billion, eight million, five thousand, seven hundred seventy-one".