89987471 has 6 divisors (see below), whose sum is σ = 104679360. Its totient is φ = 77132076.

The previous prime is 89987467. The next prime is 89987479. The reversal of 89987471 is 17478998.

It is not a de Polignac number, because 89987471 - 2² = 89987467 is a prime.

It is a super-3 number, since 3×89987471³ (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 (89987479) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 918191 + ... + 918288.

It is an arithmetic number, because the mean of its divisors is an integer number (17446560).

Almost surely, 2^89987471 is an apocalyptic number.

89987471 is a deficient number, since it is larger than the sum of its proper divisors (14691889).

89987471 is a wasteful number, since it uses less digits than its factorization.

89987471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836493 (or 1836486 counting only the distinct ones).

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

The square root of 89987471 is about 9486.1726212419. The cubic root of 89987471 is about 448.1196783129.

The spelling of 89987471 in words is "eighty-nine million, nine hundred eighty-seven thousand, four hundred seventy-one".