87308289 has 12 divisors (see below), whose sum is σ = 126192976. Its totient is φ = 58168152.

The previous prime is 87308279. The next prime is 87308293. The reversal of 87308289 is 98280378.

It is not a de Polignac number, because 87308289 - 2⁵ = 87308257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87308239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26022 + ... + 29184.

Almost surely, 2^87308289 is an apocalyptic number.

It is an amenable number.

87308289 is a deficient number, since it is larger than the sum of its proper divisors (38884687).

87308289 is a wasteful number, since it uses less digits than its factorization.

87308289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6236 (or 6233 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 87308289 is about 9343.8904638272. The cubic root of 87308289 is about 443.6275333805.

The spelling of 87308289 in words is "eighty-seven million, three hundred eight thousand, two hundred eighty-nine".