27875327989 has 2 divisors, whose sum is σ = 27875327990. Its totient is φ = 27875327988.

The previous prime is 27875327947. The next prime is 27875328001. The reversal of 27875327989 is 98972357872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21267263889 + 6608064100 = 145833^2 + 81290^2 .

It is a cyclic number.

It is not a de Polignac number, because 27875327989 - 2¹¹ = 27875325941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27875327489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13937663994 + 13937663995.

It is an arithmetic number, because the mean of its divisors is an integer number (13937663995).

Almost surely, 2^27875327989 is an apocalyptic number.

It is an amenable number.

27875327989 is a deficient number, since it is larger than the sum of its proper divisors (1).

27875327989 is an equidigital number, since it uses as much as digits as its factorization.

27875327989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 106686720, while the sum is 67.

The spelling of 27875327989 in words is "twenty-seven billion, eight hundred seventy-five million, three hundred twenty-seven thousand, nine hundred eighty-nine".