27212306689 has 2 divisors, whose sum is σ = 27212306690. Its totient is φ = 27212306688.

The previous prime is 27212306621. The next prime is 27212306699. The reversal of 27212306689 is 98660321272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22191167089 + 5021139600 = 148967^2 + 70860^2 .

It is a cyclic number.

It is not a de Polignac number, because 27212306689 - 2¹⁹ = 27211782401 is a prime.

It is not a weakly prime, because it can be changed into another prime (27212306699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13606153344 + 13606153345.

It is an arithmetic number, because the mean of its divisors is an integer number (13606153345).

Almost surely, 2^27212306689 is an apocalyptic number.

It is an amenable number.

27212306689 is a deficient number, since it is larger than the sum of its proper divisors (1).

27212306689 is an equidigital number, since it uses as much as digits as its factorization.

27212306689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 27212306689 in words is "twenty-seven billion, two hundred twelve million, three hundred six thousand, six hundred eighty-nine".