27245989 has 2 divisors, whose sum is σ = 27245990. Its totient is φ = 27245988.

The previous prime is 27245983. The next prime is 27246013. The reversal of 27245989 is 98954272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27217089 + 28900 = 5217^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 27245989 - 2¹³ = 27237797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27245983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13622994 + 13622995.

It is an arithmetic number, because the mean of its divisors is an integer number (13622995).

Almost surely, 2^27245989 is an apocalyptic number.

It is an amenable number.

27245989 is a deficient number, since it is larger than the sum of its proper divisors (1).

27245989 is an equidigital number, since it uses as much as digits as its factorization.

27245989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The square root of 27245989 is about 5219.7690561940. The cubic root of 27245989 is about 300.9083174595.

It can be divided in two parts, 27 and 245989, that added together give a square (246016 = 496²).

The spelling of 27245989 in words is "twenty-seven million, two hundred forty-five thousand, nine hundred eighty-nine".