87327921 has 4 divisors (see below), whose sum is σ = 116437232. Its totient is φ = 58218612.

The previous prime is 87327893. The next prime is 87327923. The reversal of 87327921 is 12972378.

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 87327921 - 2¹⁴ = 87311537 is a prime.

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 87327921.

It is not an unprimeable number, because it can be changed into a prime (87327923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14554651 + ... + 14554656.

It is an arithmetic number, because the mean of its divisors is an integer number (29109308).

Almost surely, 2^87327921 is an apocalyptic number.

It is an amenable number.

87327921 is a deficient number, since it is larger than the sum of its proper divisors (29109311).

87327921 is a wasteful number, since it uses less digits than its factorization.

87327921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29109310.

The product of its digits is 42336, while the sum is 39.

The square root of 87327921 is about 9344.9409307924. The cubic root of 87327921 is about 443.6607820106.

It can be divided in two parts, 8732 and 7921, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 87327921 in words is "eighty-seven million, three hundred twenty-seven thousand, nine hundred twenty-one".