87317998 has 4 divisors (see below), whose sum is σ = 130977000. Its totient is φ = 43658998.

The previous prime is 87317983. The next prime is 87318013. The reversal of 87317998 is 89971378.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (87317983) and next prime (87318013).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21829498 + ... + 21829501.

It is an arithmetic number, because the mean of its divisors is an integer number (32744250).

Almost surely, 2^87317998 is an apocalyptic number.

87317998 is a deficient number, since it is larger than the sum of its proper divisors (43659002).

87317998 is a wasteful number, since it uses less digits than its factorization.

87317998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43659001.

The product of its digits is 762048, while the sum is 52.

The square root of 87317998 is about 9344.4099867247. The cubic root of 87317998 is about 443.6439771039.

The spelling of 87317998 in words is "eighty-seven million, three hundred seventeen thousand, nine hundred ninety-eight".