27847913 has 2 divisors, whose sum is σ = 27847914. Its totient is φ = 27847912.

The previous prime is 27847909. The next prime is 27847931. The reversal of 27847913 is 31974872.

Together with next prime (27847931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17530969 + 10316944 = 4187^2 + 3212^2 .

It is a cyclic number.

It is not a de Polignac number, because 27847913 - 2² = 27847909 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27847973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13923956 + 13923957.

It is an arithmetic number, because the mean of its divisors is an integer number (13923957).

Almost surely, 2^27847913 is an apocalyptic number.

It is an amenable number.

27847913 is a deficient number, since it is larger than the sum of its proper divisors (1).

27847913 is an equidigital number, since it uses as much as digits as its factorization.

27847913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 27847913 is about 5277.1121837611. The cubic root of 27847913 is about 303.1081062325.

The spelling of 27847913 in words is "twenty-seven million, eight hundred forty-seven thousand, nine hundred thirteen".