27745853 has 4 divisors (see below), whose sum is σ = 29377980. Its totient is φ = 26113728.

The previous prime is 27745847. The next prime is 27745891. The reversal of 27745853 is 35854772.

Added to its reverse (35854772) it gives a square (63600625 = 7975²).

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 19201924 + 8543929 = 4382^2 + 2923^2 .

It is a cyclic number.

It is not a de Polignac number, because 27745853 - 2¹² = 27741757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27745853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27744853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816038 + ... + 816071.

It is an arithmetic number, because the mean of its divisors is an integer number (7344495).

Almost surely, 2^27745853 is an apocalyptic number.

It is an amenable number.

27745853 is a deficient number, since it is larger than the sum of its proper divisors (1632127).

27745853 is a wasteful number, since it uses less digits than its factorization.

27745853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632126.

The product of its digits is 235200, while the sum is 41.

The square root of 27745853 is about 5267.4332458988. The cubic root of 27745853 is about 302.7373653202.

Adding to 27745853 its reverse (35854772), we get a square (63600625 = 7975²).

The spelling of 27745853 in words is "twenty-seven million, seven hundred forty-five thousand, eight hundred fifty-three".