27087129 has 20 divisors (see below), whose sum is σ = 40718436. Its totient is φ = 17944416.

The previous prime is 27087113. The next prime is 27087143. The reversal of 27087129 is 92178072.

It can be written as a sum of positive squares in 2 ways, for example, as 21902400 + 5184729 = 4680^2 + 2277^2 .

It is not a de Polignac number, because 27087129 - 2⁴ = 27087113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27087093 and 27087102.

It is not an unprimeable number, because it can be changed into a prime (27080129) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13047 + ... + 14979.

Almost surely, 2^27087129 is an apocalyptic number.

It is an amenable number.

27087129 is a deficient number, since it is larger than the sum of its proper divisors (13631307).

27087129 is a wasteful number, since it uses less digits than its factorization.

27087129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118 (or 2109 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 27087129 is about 5204.5296617466. The cubic root of 27087129 is about 300.3223535033.

The spelling of 27087129 in words is "twenty-seven million, eighty-seven thousand, one hundred twenty-nine".