87008742089 has 2 divisors, whose sum is σ = 87008742090. Its totient is φ = 87008742088.

The previous prime is 87008742043. The next prime is 87008742109. The reversal of 87008742089 is 98024780078.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85195685689 + 1813056400 = 291883^2 + 42580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87008742089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87008742089.

It is not a weakly prime, because it can be changed into another prime (87008748089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43504371044 + 43504371045.

It is an arithmetic number, because the mean of its divisors is an integer number (43504371045).

Almost surely, 2^87008742089 is an apocalyptic number.

It is an amenable number.

87008742089 is a deficient number, since it is larger than the sum of its proper divisors (1).

87008742089 is an equidigital number, since it uses as much as digits as its factorization.

87008742089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1806336, while the sum is 53.

The spelling of 87008742089 in words is "eighty-seven billion, eight million, seven hundred forty-two thousand, eighty-nine".