27485789 has 2 divisors, whose sum is σ = 27485790. Its totient is φ = 27485788.

The previous prime is 27485779. The next prime is 27485791. The reversal of 27485789 is 98758472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27478564 + 7225 = 5242^2 + 85^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27485789 is a prime.

Together with 27485791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27485749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13742894 + 13742895.

It is an arithmetic number, because the mean of its divisors is an integer number (13742895).

Almost surely, 2^27485789 is an apocalyptic number.

It is an amenable number.

27485789 is a deficient number, since it is larger than the sum of its proper divisors (1).

27485789 is an equidigital number, since it uses as much as digits as its factorization.

27485789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 50.

The square root of 27485789 is about 5242.6891000707. The cubic root of 27485789 is about 301.7885344767.

The spelling of 27485789 in words is "twenty-seven million, four hundred eighty-five thousand, seven hundred eighty-nine".