87719089 has 4 divisors (see below), whose sum is σ = 87754356. Its totient is φ = 87683824.

The previous prime is 87719083. The next prime is 87719101. The reversal of 87719089 is 98091778.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98091778 = 2 ⋅49045889.

It can be written as a sum of positive squares in 2 ways, for example, as 12723489 + 74995600 = 3567^2 + 8660^2 .

It is a cyclic number.

It is not a de Polignac number, because 87719089 - 2¹⁹ = 87194801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87719083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13594 + ... + 18979.

It is an arithmetic number, because the mean of its divisors is an integer number (21938589).

Almost surely, 2^87719089 is an apocalyptic number.

It is an amenable number.

87719089 is a deficient number, since it is larger than the sum of its proper divisors (35267).

87719089 is a wasteful number, since it uses less digits than its factorization.

87719089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35266.

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 87719089 is about 9365.8469451513. The cubic root of 87719089 is about 444.3222253775.

The spelling of 87719089 in words is "eighty-seven million, seven hundred nineteen thousand, eighty-nine".