27689839 has 2 divisors, whose sum is σ = 27689840. Its totient is φ = 27689838.

The previous prime is 27689833. The next prime is 27689869. The reversal of 27689839 is 93898672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27689839 - 2²³ = 19301231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27689833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13844919 + 13844920.

It is an arithmetic number, because the mean of its divisors is an integer number (13844920).

Almost surely, 2^27689839 is an apocalyptic number.

27689839 is a deficient number, since it is larger than the sum of its proper divisors (1).

27689839 is an equidigital number, since it uses as much as digits as its factorization.

27689839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 27689839 is about 5262.1135487559. The cubic root of 27689839 is about 302.5335035632.

The spelling of 27689839 in words is "twenty-seven million, six hundred eighty-nine thousand, eight hundred thirty-nine".