27813239 has 2 divisors, whose sum is σ = 27813240. Its totient is φ = 27813238.

The previous prime is 27813221. The next prime is 27813251. The reversal of 27813239 is 93231872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27813239 - 2¹⁶ = 27747703 is a prime.

It is a super-2 number, since 2×27813239² = 1547152527342242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27813199 and 27813208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27813209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13906619 + 13906620.

It is an arithmetic number, because the mean of its divisors is an integer number (13906620).

Almost surely, 2^27813239 is an apocalyptic number.

27813239 is a deficient number, since it is larger than the sum of its proper divisors (1).

27813239 is an equidigital number, since it uses as much as digits as its factorization.

27813239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 27813239 is about 5273.8258408863. The cubic root of 27813239 is about 302.9822519712.

The spelling of 27813239 in words is "twenty-seven million, eight hundred thirteen thousand, two hundred thirty-nine".