27391297 has 2 divisors, whose sum is σ = 27391298. Its totient is φ = 27391296.

The previous prime is 27391291. The next prime is 27391307. The reversal of 27391297 is 79219372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17048641 + 10342656 = 4129^2 + 3216^2 .

It is a cyclic number.

It is not a de Polignac number, because 27391297 - 2³ = 27391289 is a prime.

It is not a weakly prime, because it can be changed into another prime (27391291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13695648 + 13695649.

It is an arithmetic number, because the mean of its divisors is an integer number (13695649).

Almost surely, 2^27391297 is an apocalyptic number.

It is an amenable number.

27391297 is a deficient number, since it is larger than the sum of its proper divisors (1).

27391297 is an equidigital number, since it uses as much as digits as its factorization.

27391297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 40.

The square root of 27391297 is about 5233.6695539554. The cubic root of 27391297 is about 301.4423029102.

The spelling of 27391297 in words is "twenty-seven million, three hundred ninety-one thousand, two hundred ninety-seven".