27847933109 has 2 divisors, whose sum is σ = 27847933110. Its totient is φ = 27847933108.

The previous prime is 27847933097. The next prime is 27847933111. The reversal of 27847933109 is 90133974872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14633740900 + 13214192209 = 120970^2 + 114953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27847933109 is a prime.

Together with 27847933111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27847935109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13923966554 + 13923966555.

It is an arithmetic number, because the mean of its divisors is an integer number (13923966555).

Almost surely, 2^27847933109 is an apocalyptic number.

It is an amenable number.

27847933109 is a deficient number, since it is larger than the sum of its proper divisors (1).

27847933109 is an equidigital number, since it uses as much as digits as its factorization.

27847933109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 27847933109 in words is "twenty-seven billion, eight hundred forty-seven million, nine hundred thirty-three thousand, one hundred nine".