27697679 has 2 divisors, whose sum is σ = 27697680. Its totient is φ = 27697678.

The previous prime is 27697643. The next prime is 27697717. The reversal of 27697679 is 97679672.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27697679 is a prime.

It is a super-3 number, since 3×27697679³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27697679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27697619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13848839 + 13848840.

It is an arithmetic number, because the mean of its divisors is an integer number (13848840).

Almost surely, 2^27697679 is an apocalyptic number.

27697679 is a deficient number, since it is larger than the sum of its proper divisors (1).

27697679 is an equidigital number, since it uses as much as digits as its factorization.

27697679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2000376, while the sum is 53.

The square root of 27697679 is about 5262.8584438497. The cubic root of 27697679 is about 302.5620536131.

The spelling of 27697679 in words is "twenty-seven million, six hundred ninety-seven thousand, six hundred seventy-nine".