87998471 has 8 divisors (see below), whose sum is σ = 96092688. Its totient is φ = 79920000.

The previous prime is 87998467. The next prime is 87998489. The reversal of 87998471 is 17489978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87998471 - 2² = 87998467 is a prime.

It is a super-3 number, since 3×87998471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87998401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9881 + ... + 16541.

It is an arithmetic number, because the mean of its divisors is an integer number (12011586).

Almost surely, 2^87998471 is an apocalyptic number.

87998471 is a deficient number, since it is larger than the sum of its proper divisors (8094217).

87998471 is a wasteful number, since it uses less digits than its factorization.

87998471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7873.

The product of its digits is 1016064, while the sum is 53.

The square root of 87998471 is about 9380.7500233190. The cubic root of 87998471 is about 444.7934419887.

The spelling of 87998471 in words is "eighty-seven million, nine hundred ninety-eight thousand, four hundred seventy-one".