27298591 has 2 divisors, whose sum is σ = 27298592. Its totient is φ = 27298590.

The previous prime is 27298571. The next prime is 27298597. The reversal of 27298591 is 19589272.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27298591 - 2²¹ = 25201439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27298597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13649295 + 13649296.

It is an arithmetic number, because the mean of its divisors is an integer number (13649296).

Almost surely, 2^27298591 is an apocalyptic number.

27298591 is a deficient number, since it is larger than the sum of its proper divisors (1).

27298591 is an equidigital number, since it uses as much as digits as its factorization.

27298591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 43.

The square root of 27298591 is about 5224.8053552262. The cubic root of 27298591 is about 301.1018407944.

It can be divided in two parts, 27298 and 591, that added together give a square (27889 = 167²).

The spelling of 27298591 in words is "twenty-seven million, two hundred ninety-eight thousand, five hundred ninety-one".