87039089 has 2 divisors, whose sum is σ = 87039090. Its totient is φ = 87039088.

The previous prime is 87039083. The next prime is 87039109. The reversal of 87039089 is 98093078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81360400 + 5678689 = 9020^2 + 2383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87039089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87039083) 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, 43519544 + 43519545.

It is an arithmetic number, because the mean of its divisors is an integer number (43519545).

Almost surely, 2^87039089 is an apocalyptic number.

It is an amenable number.

87039089 is a deficient number, since it is larger than the sum of its proper divisors (1).

87039089 is an equidigital number, since it uses as much as digits as its factorization.

87039089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 87039089 is about 9329.4742081213. The cubic root of 87039089 is about 443.1711143865.

The spelling of 87039089 in words is "eighty-seven million, thirty-nine thousand, eighty-nine".