87887089 has 2 divisors, whose sum is σ = 87887090. Its totient is φ = 87887088.

The previous prime is 87887087. The next prime is 87887101. The reversal of 87887089 is 98078878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58369600 + 29517489 = 7640^2 + 5433^2 .

It is a cyclic number.

It is not a de Polignac number, because 87887089 - 2¹ = 87887087 is a prime.

Together with 87887087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (87887083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43943544 + 43943545.

It is an arithmetic number, because the mean of its divisors is an integer number (43943545).

Almost surely, 2^87887089 is an apocalyptic number.

It is an amenable number.

87887089 is a deficient number, since it is larger than the sum of its proper divisors (1).

87887089 is an equidigital number, since it uses as much as digits as its factorization.

87887089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1806336, while the sum is 55.

The square root of 87887089 is about 9374.8114114365. The cubic root of 87887089 is about 444.6057004688.

The spelling of 87887089 in words is "eighty-seven million, eight hundred eighty-seven thousand, eighty-nine".