27763145 has 4 divisors (see below), whose sum is σ = 33315780. Its totient is φ = 22210512.

The previous prime is 27763133. The next prime is 27763147. The reversal of 27763145 is 54136772.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9853321 + 17909824 = 3139^2 + 4232^2 .

It is a cyclic number.

It is not a de Polignac number, because 27763145 - 2⁴ = 27763129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27763147) 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, 2776310 + ... + 2776319.

It is an arithmetic number, because the mean of its divisors is an integer number (8328945).

Almost surely, 2^27763145 is an apocalyptic number.

It is an amenable number.

27763145 is a deficient number, since it is larger than the sum of its proper divisors (5552635).

27763145 is an equidigital number, since it uses as much as digits as its factorization.

27763145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5552634.

The product of its digits is 35280, while the sum is 35.

The square root of 27763145 is about 5269.0743968936. The cubic root of 27763145 is about 302.8002437544.

The spelling of 27763145 in words is "twenty-seven million, seven hundred sixty-three thousand, one hundred forty-five".