27591257 has 2 divisors, whose sum is σ = 27591258. Its totient is φ = 27591256.

The previous prime is 27591253. The next prime is 27591259. The reversal of 27591257 is 75219572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27415696 + 175561 = 5236^2 + 419^2 .

It is a cyclic number.

It is not a de Polignac number, because 27591257 - 2² = 27591253 is a prime.

It is a super-2 number, since 2×27591257² = 1522554925680098, which contains 22 as substring.

Together with 27591259, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27591257.

It is not a weakly prime, because it can be changed into another prime (27591253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13795628 + 13795629.

It is an arithmetic number, because the mean of its divisors is an integer number (13795629).

Almost surely, 2^27591257 is an apocalyptic number.

It is an amenable number.

27591257 is a deficient number, since it is larger than the sum of its proper divisors (1).

27591257 is an equidigital number, since it uses as much as digits as its factorization.

27591257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44100, while the sum is 38.

The square root of 27591257 is about 5252.7380479137. The cubic root of 27591257 is about 302.1740477377.

The spelling of 27591257 in words is "twenty-seven million, five hundred ninety-one thousand, two hundred fifty-seven".