27631139 has 2 divisors, whose sum is σ = 27631140. Its totient is φ = 27631138.

The previous prime is 27631133. The next prime is 27631169. The reversal of 27631139 is 93113672.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27631139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27631133) 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, 13815569 + 13815570.

It is an arithmetic number, because the mean of its divisors is an integer number (13815570).

Almost surely, 2^27631139 is an apocalyptic number.

27631139 is a deficient number, since it is larger than the sum of its proper divisors (1).

27631139 is an equidigital number, since it uses as much as digits as its factorization.

27631139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 32.

The square root of 27631139 is about 5256.5329828700. The cubic root of 27631139 is about 302.3195709311.

The spelling of 27631139 in words is "twenty-seven million, six hundred thirty-one thousand, one hundred thirty-nine".