27312517 has 2 divisors, whose sum is σ = 27312518. Its totient is φ = 27312516.

The previous prime is 27312497. The next prime is 27312529. The reversal of 27312517 is 71521372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25391521 + 1920996 = 5039^2 + 1386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27312517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27312547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13656258 + 13656259.

It is an arithmetic number, because the mean of its divisors is an integer number (13656259).

Almost surely, 2^27312517 is an apocalyptic number.

It is an amenable number.

27312517 is a deficient number, since it is larger than the sum of its proper divisors (1).

27312517 is an equidigital number, since it uses as much as digits as its factorization.

27312517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2940, while the sum is 28.

The square root of 27312517 is about 5226.1378665320. The cubic root of 27312517 is about 301.1530330752.

Adding to 27312517 its reverse (71521372), we get a palindrome (98833889).

The spelling of 27312517 in words is "twenty-seven million, three hundred twelve thousand, five hundred seventeen".