87573 has 4 divisors (see below), whose sum is σ = 116768. Its totient is φ = 58380.
The previous prime is 87559. The next prime is 87583. The reversal of 87573 is 37578.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is not a de Polignac number, because 87573 - 24 = 87557 is a prime.
It is a D-number.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 87573.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (87523) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14593 + ... + 14598.
It is an arithmetic number, because the mean of its divisors is an integer number (29192).
287573 is an apocalyptic number.
It is an amenable number.
87573 is a deficient number, since it is larger than the sum of its proper divisors (29195).
87573 is a wasteful number, since it uses less digits than its factorization.
87573 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 29194.
The product of its digits is 5880, while the sum is 30.
The square root of 87573 is about 295.9273559507. The cubic root of 87573 is about 44.4075427491.
The spelling of 87573 in words is "eighty-seven thousand, five hundred seventy-three".
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