87289317 has 12 divisors (see below), whose sum is σ = 127861344. Its totient is φ = 57372840.

The previous prime is 87289309. The next prime is 87289337. The reversal of 87289317 is 71398278.

It is not a de Polignac number, because 87289317 - 2³ = 87289309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87289337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67663 + ... + 68940.

It is an arithmetic number, because the mean of its divisors is an integer number (10655112).

Almost surely, 2^87289317 is an apocalyptic number.

It is an amenable number.

87289317 is a deficient number, since it is larger than the sum of its proper divisors (40572027).

87289317 is a wasteful number, since it uses less digits than its factorization.

87289317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136680 (or 136677 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 87289317 is about 9342.8751998515. The cubic root of 87289317 is about 443.5953977861.

The spelling of 87289317 in words is "eighty-seven million, two hundred eighty-nine thousand, three hundred seventeen".