27087321 has 4 divisors (see below), whose sum is σ = 36116432. Its totient is φ = 18058212.

The previous prime is 27087301. The next prime is 27087323. The reversal of 27087321 is 12378072.

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 27087321 - 2⁵ = 27087289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27087323) 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, 4514551 + ... + 4514556.

It is an arithmetic number, because the mean of its divisors is an integer number (9029108).

Almost surely, 2^27087321 is an apocalyptic number.

It is an amenable number.

27087321 is a deficient number, since it is larger than the sum of its proper divisors (9029111).

27087321 is an equidigital number, since it uses as much as digits as its factorization.

27087321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9029110.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 27087321 is about 5204.5481071847. The cubic root of 27087321 is about 300.3230630870.

Adding to 27087321 its product of nonzero digits (4704), we get a square (27092025 = 5205²).

The spelling of 27087321 in words is "twenty-seven million, eighty-seven thousand, three hundred twenty-one".