27289997 has 16 divisors (see below), whose sum is σ = 32140800. Its totient is φ = 22688640.

The previous prime is 27289991. The next prime is 27290017. The reversal of 27289997 is 79998272.

It is a cyclic number.

It is not a de Polignac number, because 27289997 - 2⁸ = 27289741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27289991) 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 in 15 ways as a sum of consecutive naturals, for example, 33329 + ... + 34137.

It is an arithmetic number, because the mean of its divisors is an integer number (2008800).

Almost surely, 2^27289997 is an apocalyptic number.

It is an amenable number.

27289997 is a deficient number, since it is larger than the sum of its proper divisors (4850803).

27289997 is an equidigital number, since it uses as much as digits as its factorization.

27289997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956.

The product of its digits is 1143072, while the sum is 53.

The square root of 27289997 is about 5223.9828675064. The cubic root of 27289997 is about 301.0702403745.

The spelling of 27289997 in words is "twenty-seven million, two hundred eighty-nine thousand, nine hundred ninety-seven".