27380257 has 2 divisors, whose sum is σ = 27380258. Its totient is φ = 27380256.

The previous prime is 27380237. The next prime is 27380279. The reversal of 27380257 is 75208372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21446161 + 5934096 = 4631^2 + 2436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27380257 is a prime.

It is not a weakly prime, because it can be changed into another prime (27380237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13690128 + 13690129.

It is an arithmetic number, because the mean of its divisors is an integer number (13690129).

Almost surely, 2^27380257 is an apocalyptic number.

It is an amenable number.

27380257 is a deficient number, since it is larger than the sum of its proper divisors (1).

27380257 is an equidigital number, since it uses as much as digits as its factorization.

27380257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 27380257 is about 5232.6147383502. The cubic root of 27380257 is about 301.4017989230.

The spelling of 27380257 in words is "twenty-seven million, three hundred eighty thousand, two hundred fifty-seven".