87326521 has 8 divisors (see below), whose sum is σ = 89683200. Its totient is φ = 85001280.

The previous prime is 87326483. The next prime is 87326531. The reversal of 87326521 is 12562378.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87326521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87326531) 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, 2176 + ... + 13393.

It is an arithmetic number, because the mean of its divisors is an integer number (11210400).

Almost surely, 2^87326521 is an apocalyptic number.

It is an amenable number.

87326521 is a deficient number, since it is larger than the sum of its proper divisors (2356679).

87326521 is a wasteful number, since it uses less digits than its factorization.

87326521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15719.

The product of its digits is 20160, while the sum is 34.

The square root of 87326521 is about 9344.8660236517. The cubic root of 87326521 is about 443.6584111445.

Adding to 87326521 its reverse (12562378), we get a palindrome (99888899).

The spelling of 87326521 in words is "eighty-seven million, three hundred twenty-six thousand, five hundred twenty-one".