27442813 has 2 divisors, whose sum is σ = 27442814. Its totient is φ = 27442812.

The previous prime is 27442799. The next prime is 27442819. The reversal of 27442813 is 31824472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18992164 + 8450649 = 4358^2 + 2907^2 .

It is a cyclic number.

It is not a de Polignac number, because 27442813 - 2¹³ = 27434621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27442819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13721406 + 13721407.

It is an arithmetic number, because the mean of its divisors is an integer number (13721407).

Almost surely, 2^27442813 is an apocalyptic number.

It is an amenable number.

27442813 is a deficient number, since it is larger than the sum of its proper divisors (1).

27442813 is an equidigital number, since it uses as much as digits as its factorization.

27442813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 31.

The square root of 27442813 is about 5238.5888367002. The cubic root of 27442813 is about 301.6311630972.

The spelling of 27442813 in words is "twenty-seven million, four hundred forty-two thousand, eight hundred thirteen".