27488921 has 2 divisors, whose sum is σ = 27488922. Its totient is φ = 27488920.

The previous prime is 27488917. The next prime is 27488939. The reversal of 27488921 is 12988472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21752896 + 5736025 = 4664^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 27488921 - 2² = 27488917 is a prime.

It is not a weakly prime, because it can be changed into another prime (27488221) 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, 13744460 + 13744461.

It is an arithmetic number, because the mean of its divisors is an integer number (13744461).

Almost surely, 2^27488921 is an apocalyptic number.

It is an amenable number.

27488921 is a deficient number, since it is larger than the sum of its proper divisors (1).

27488921 is an equidigital number, since it uses as much as digits as its factorization.

27488921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The square root of 27488921 is about 5242.9877932339. The cubic root of 27488921 is about 301.7999969552.

The spelling of 27488921 in words is "twenty-seven million, four hundred eighty-eight thousand, nine hundred twenty-one".