27385921 has 2 divisors, whose sum is σ = 27385922. Its totient is φ = 27385920.

The previous prime is 27385879. The next prime is 27385931. The reversal of 27385921 is 12958372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15689521 + 11696400 = 3961^2 + 3420^2 .

It is a cyclic number.

It is not a de Polignac number, because 27385921 - 2⁹ = 27385409 is a prime.

It is not a weakly prime, because it can be changed into another prime (27385931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13692960 + 13692961.

It is an arithmetic number, because the mean of its divisors is an integer number (13692961).

Almost surely, 2^27385921 is an apocalyptic number.

It is an amenable number.

27385921 is a deficient number, since it is larger than the sum of its proper divisors (1).

27385921 is an equidigital number, since it uses as much as digits as its factorization.

27385921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 27385921 is about 5233.1559311758. The cubic root of 27385921 is about 301.4225805892.

The spelling of 27385921 in words is "twenty-seven million, three hundred eighty-five thousand, nine hundred twenty-one".