27697393 has 2 divisors, whose sum is σ = 27697394. Its totient is φ = 27697392.

The previous prime is 27697391. The next prime is 27697447. The reversal of 27697393 is 39379672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18558864 + 9138529 = 4308^2 + 3023^2 .

It is a cyclic number.

It is not a de Polignac number, because 27697393 - 2¹ = 27697391 is a prime.

Together with 27697391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27697391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13848696 + 13848697.

It is an arithmetic number, because the mean of its divisors is an integer number (13848697).

Almost surely, 2^27697393 is an apocalyptic number.

It is an amenable number.

27697393 is a deficient number, since it is larger than the sum of its proper divisors (1).

27697393 is an equidigital number, since it uses as much as digits as its factorization.

27697393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 46.

The square root of 27697393 is about 5262.8312722336. The cubic root of 27697393 is about 302.5610122136.

The spelling of 27697393 in words is "twenty-seven million, six hundred ninety-seven thousand, three hundred ninety-three".