27139249 has 2 divisors, whose sum is σ = 27139250. Its totient is φ = 27139248.

The previous prime is 27139247. The next prime is 27139267. The reversal of 27139249 is 94293172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24601600 + 2537649 = 4960^2 + 1593^2 .

It is a cyclic number.

It is not a de Polignac number, because 27139249 - 2¹ = 27139247 is a prime.

Together with 27139247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27139243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13569624 + 13569625.

It is an arithmetic number, because the mean of its divisors is an integer number (13569625).

Almost surely, 2^27139249 is an apocalyptic number.

It is an amenable number.

27139249 is a deficient number, since it is larger than the sum of its proper divisors (1).

27139249 is an equidigital number, since it uses as much as digits as its factorization.

27139249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 27139249 is about 5209.5344321734. The cubic root of 27139249 is about 300.5148529530.

It can be divided in two parts, 271392 and 49, that added together give a square (271441 = 521²).

The spelling of 27139249 in words is "twenty-seven million, one hundred thirty-nine thousand, two hundred forty-nine".