27640339 has 2 divisors, whose sum is σ = 27640340. Its totient is φ = 27640338.

The previous prime is 27640303. The next prime is 27640363. The reversal of 27640339 is 93304672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27640339 - 2⁷ = 27640211 is a prime.

It is not a weakly prime, because it can be changed into another prime (27640439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13820169 + 13820170.

It is an arithmetic number, because the mean of its divisors is an integer number (13820170).

Almost surely, 2^27640339 is an apocalyptic number.

27640339 is a deficient number, since it is larger than the sum of its proper divisors (1).

27640339 is an equidigital number, since it uses as much as digits as its factorization.

27640339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 27640339 is about 5257.4080115585. The cubic root of 27640339 is about 302.3531204157.

The spelling of 27640339 in words is "twenty-seven million, six hundred forty thousand, three hundred thirty-nine".