27664697 has 2 divisors, whose sum is σ = 27664698. Its totient is φ = 27664696.

The previous prime is 27664673. The next prime is 27664727. The reversal of 27664697 is 79646672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27415696 + 249001 = 5236^2 + 499^2 .

It is a cyclic number.

It is not a de Polignac number, because 27664697 - 2²² = 23470393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27664397) 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, 13832348 + 13832349.

It is an arithmetic number, because the mean of its divisors is an integer number (13832349).

Almost surely, 2^27664697 is an apocalyptic number.

It is an amenable number.

27664697 is a deficient number, since it is larger than the sum of its proper divisors (1).

27664697 is an equidigital number, since it uses as much as digits as its factorization.

27664697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 47.

The square root of 27664697 is about 5259.7240421908. The cubic root of 27664697 is about 302.4419103902.

The spelling of 27664697 in words is "twenty-seven million, six hundred sixty-four thousand, six hundred ninety-seven".