27608813 has 4 divisors (see below), whose sum is σ = 28129788. Its totient is φ = 27087840.

The previous prime is 27608803. The next prime is 27608821. The reversal of 27608813 is 31880672.

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 7912969 + 19695844 = 2813^2 + 4438^2 .

It is a cyclic number.

It is not a de Polignac number, because 27608813 - 2⁴ = 27608797 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 (27608803) 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, 260408 + ... + 260513.

It is an arithmetic number, because the mean of its divisors is an integer number (7032447).

Almost surely, 2^27608813 is an apocalyptic number.

It is an amenable number.

27608813 is a deficient number, since it is larger than the sum of its proper divisors (520975).

27608813 is an equidigital number, since it uses as much as digits as its factorization.

27608813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520974.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 27608813 is about 5254.4089106197. The cubic root of 27608813 is about 302.2381241082.

The spelling of 27608813 in words is "twenty-seven million, six hundred eight thousand, eight hundred thirteen".