27642497 has 2 divisors, whose sum is σ = 27642498. Its totient is φ = 27642496.

The previous prime is 27642491. The next prime is 27642529. The reversal of 27642497 is 79424672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17631601 + 10010896 = 4199^2 + 3164^2 .

It is a cyclic number.

It is not a de Polignac number, because 27642497 - 2¹⁴ = 27626113 is a prime.

It is a super-4 number, since 4×27642497⁴ (a number of 31 digits) contains 4444 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27642491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13821248 + 13821249.

It is an arithmetic number, because the mean of its divisors is an integer number (13821249).

Almost surely, 2^27642497 is an apocalyptic number.

It is an amenable number.

27642497 is a deficient number, since it is larger than the sum of its proper divisors (1).

27642497 is an equidigital number, since it uses as much as digits as its factorization.

27642497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 41.

The square root of 27642497 is about 5257.6132417666. The cubic root of 27642497 is about 302.3609888799.

The spelling of 27642497 in words is "twenty-seven million, six hundred forty-two thousand, four hundred ninety-seven".