27873613 has 2 divisors, whose sum is σ = 27873614. Its totient is φ = 27873612.

The previous prime is 27873569. The next prime is 27873647. The reversal of 27873613 is 31637872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23785129 + 4088484 = 4877^2 + 2022^2 .

It is a cyclic number.

It is not a de Polignac number, because 27873613 - 2¹³ = 27865421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27873653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13936806 + 13936807.

It is an arithmetic number, because the mean of its divisors is an integer number (13936807).

Almost surely, 2^27873613 is an apocalyptic number.

It is an amenable number.

27873613 is a deficient number, since it is larger than the sum of its proper divisors (1).

27873613 is an equidigital number, since it uses as much as digits as its factorization.

27873613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 27873613 is about 5279.5466661447. The cubic root of 27873613 is about 303.2013206768.

It can be divided in two parts, 2787 and 3613, that added together give a square (6400 = 80²).

The spelling of 27873613 in words is "twenty-seven million, eight hundred seventy-three thousand, six hundred thirteen".