27496921 has 2 divisors, whose sum is σ = 27496922. Its totient is φ = 27496920.

The previous prime is 27496919. The next prime is 27496943. The reversal of 27496921 is 12969472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27415696 + 81225 = 5236^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 27496921 - 2¹ = 27496919 is a prime.

Together with 27496919, it forms a pair of twin primes.

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

It is not a weakly prime, because it can be changed into another prime (27496981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13748460 + 13748461.

It is an arithmetic number, because the mean of its divisors is an integer number (13748461).

Almost surely, 2^27496921 is an apocalyptic number.

It is an amenable number.

27496921 is a deficient number, since it is larger than the sum of its proper divisors (1).

27496921 is an equidigital number, since it uses as much as digits as its factorization.

27496921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 27496921 is about 5243.7506615017. The cubic root of 27496921 is about 301.8292713647.

The spelling of 27496921 in words is "twenty-seven million, four hundred ninety-six thousand, nine hundred twenty-one".