27159997 has 2 divisors, whose sum is σ = 27159998. Its totient is φ = 27159996.

The previous prime is 27159989. The next prime is 27160019. The reversal of 27159997 is 79995172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27154521 + 5476 = 5211^2 + 74^2 .

It is a cyclic number.

It is not a de Polignac number, because 27159997 - 2³ = 27159989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27159997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27159947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13579998 + 13579999.

It is an arithmetic number, because the mean of its divisors is an integer number (13579999).

Almost surely, 2^27159997 is an apocalyptic number.

It is an amenable number.

27159997 is a deficient number, since it is larger than the sum of its proper divisors (1).

27159997 is an equidigital number, since it uses as much as digits as its factorization.

27159997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 49.

The square root of 27159997 is about 5211.5254004946. The cubic root of 27159997 is about 300.5914148104.

The spelling of 27159997 in words is "twenty-seven million, one hundred fifty-nine thousand, nine hundred ninety-seven".