27748453 has 2 divisors, whose sum is σ = 27748454. Its totient is φ = 27748452.

The previous prime is 27748451. The next prime is 27748481. The reversal of 27748453 is 35484772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27699169 + 49284 = 5263^2 + 222^2 .

It is a cyclic number.

It is not a de Polignac number, because 27748453 - 2¹ = 27748451 is a prime.

Together with 27748451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27748451) 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 as a sum of consecutive naturals, namely, 13874226 + 13874227.

It is an arithmetic number, because the mean of its divisors is an integer number (13874227).

Almost surely, 2^27748453 is an apocalyptic number.

It is an amenable number.

27748453 is a deficient number, since it is larger than the sum of its proper divisors (1).

27748453 is an equidigital number, since it uses as much as digits as its factorization.

27748453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 40.

The square root of 27748453 is about 5267.6800396379. The cubic root of 27748453 is about 302.7468212987.

The spelling of 27748453 in words is "twenty-seven million, seven hundred forty-eight thousand, four hundred fifty-three".