27388131 has 4 divisors (see below), whose sum is σ = 36517512. Its totient is φ = 18258752.

The previous prime is 27388129. The next prime is 27388181. The reversal of 27388131 is 13188372.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27388131 - 2¹ = 27388129 is a prime.

It is a super-2 number, since 2×27388131² = 1500219439346322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27388092 and 27388101.

It is not an unprimeable number, because it can be changed into a prime (27388111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4564686 + ... + 4564691.

It is an arithmetic number, because the mean of its divisors is an integer number (9129378).

Almost surely, 2^27388131 is an apocalyptic number.

27388131 is a deficient number, since it is larger than the sum of its proper divisors (9129381).

27388131 is an equidigital number, since it uses as much as digits as its factorization.

27388131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9129380.

The product of its digits is 8064, while the sum is 33.

The square root of 27388131 is about 5233.3670805706. The cubic root of 27388131 is about 301.4306884778.

The spelling of 27388131 in words is "twenty-seven million, three hundred eighty-eight thousand, one hundred thirty-one".