27389797 has 2 divisors, whose sum is σ = 27389798. Its totient is φ = 27389796.

The previous prime is 27389783. The next prime is 27389809. The reversal of 27389797 is 79798372.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25542916 + 1846881 = 5054^2 + 1359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27389797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27389497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13694898 + 13694899.

It is an arithmetic number, because the mean of its divisors is an integer number (13694899).

Almost surely, 2^27389797 is an apocalyptic number.

It is an amenable number.

27389797 is a deficient number, since it is larger than the sum of its proper divisors (1).

27389797 is an equidigital number, since it uses as much as digits as its factorization.

27389797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1333584, while the sum is 52.

The square root of 27389797 is about 5233.5262490982. The cubic root of 27389797 is about 301.4368002900.

The spelling of 27389797 in words is "twenty-seven million, three hundred eighty-nine thousand, seven hundred ninety-seven".