272638489 has 2 divisors, whose sum is σ = 272638490. Its totient is φ = 272638488.

The previous prime is 272638441. The next prime is 272638517. The reversal of 272638489 is 984836272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265429264 + 7209225 = 16292^2 + 2685^2 .

It is a cyclic number.

It is not a de Polignac number, because 272638489 - 2⁹ = 272637977 is a prime.

It is not a weakly prime, because it can be changed into another prime (272638409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136319244 + 136319245.

It is an arithmetic number, because the mean of its divisors is an integer number (136319245).

Almost surely, 2^272638489 is an apocalyptic number.

It is an amenable number.

272638489 is a deficient number, since it is larger than the sum of its proper divisors (1).

272638489 is an equidigital number, since it uses as much as digits as its factorization.

272638489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 49.

The square root of 272638489 is about 16511.7681972586. The cubic root of 272638489 is about 648.4289387158.

The spelling of 272638489 in words is "two hundred seventy-two million, six hundred thirty-eight thousand, four hundred eighty-nine".