27897251 has 2 divisors, whose sum is σ = 27897252. Its totient is φ = 27897250.

The previous prime is 27897211. The next prime is 27897257. The reversal of 27897251 is 15279872.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27897251 is a prime.

It is a super-2 number, since 2×27897251² = 1556513226714002, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27897199 and 27897208.

It is not a weakly prime, because it can be changed into another prime (27897257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13948625 + 13948626.

It is an arithmetic number, because the mean of its divisors is an integer number (13948626).

Almost surely, 2^27897251 is an apocalyptic number.

27897251 is a deficient number, since it is larger than the sum of its proper divisors (1).

27897251 is an equidigital number, since it uses as much as digits as its factorization.

27897251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 41.

The square root of 27897251 is about 5281.7848309071. The cubic root of 27897251 is about 303.2870056313.

The spelling of 27897251 in words is "twenty-seven million, eight hundred ninety-seven thousand, two hundred fifty-one".