27298981 has 2 divisors, whose sum is σ = 27298982. Its totient is φ = 27298980.

The previous prime is 27298967. The next prime is 27298993. The reversal of 27298981 is 18989272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26316900 + 982081 = 5130^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 27298981 - 2¹¹ = 27296933 is a prime.

It is a super-2 number, since 2×27298981² = 1490468727276722, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27298951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13649490 + 13649491.

It is an arithmetic number, because the mean of its divisors is an integer number (13649491).

Almost surely, 2^27298981 is an apocalyptic number.

It is an amenable number.

27298981 is a deficient number, since it is larger than the sum of its proper divisors (1).

27298981 is an equidigital number, since it uses as much as digits as its factorization.

27298981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 46.

The square root of 27298981 is about 5224.8426770574. The cubic root of 27298981 is about 301.1032746799.

The spelling of 27298981 in words is "twenty-seven million, two hundred ninety-eight thousand, nine hundred eighty-one".