27145663 has 4 divisors (see below), whose sum is σ = 27198288. Its totient is φ = 27093040.

The previous prime is 27145639. The next prime is 27145667. The reversal of 27145663 is 36654172.

It is a happy number.

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 27145663 - 2²¹ = 25048511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27145667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25531 + ... + 26572.

It is an arithmetic number, because the mean of its divisors is an integer number (6799572).

Almost surely, 2^27145663 is an apocalyptic number.

27145663 is a deficient number, since it is larger than the sum of its proper divisors (52625).

27145663 is an equidigital number, since it uses as much as digits as its factorization.

27145663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52624.

The product of its digits is 30240, while the sum is 34.

The square root of 27145663 is about 5210.1499978408. The cubic root of 27145663 is about 300.5385253158.

The spelling of 27145663 in words is "twenty-seven million, one hundred forty-five thousand, six hundred sixty-three".