27872489 has 2 divisors, whose sum is σ = 27872490. Its totient is φ = 27872488.

The previous prime is 27872483. The next prime is 27872519. The reversal of 27872489 is 98427872.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21086464 + 6786025 = 4592^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 27872489 - 2⁸ = 27872233 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27872483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13936244 + 13936245.

It is an arithmetic number, because the mean of its divisors is an integer number (13936245).

Almost surely, 2^27872489 is an apocalyptic number.

It is an amenable number.

27872489 is a deficient number, since it is larger than the sum of its proper divisors (1).

27872489 is an equidigital number, since it uses as much as digits as its factorization.

27872489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 47.

The square root of 27872489 is about 5279.4402165381. The cubic root of 27872489 is about 303.1972451034.

The spelling of 27872489 in words is "twenty-seven million, eight hundred seventy-two thousand, four hundred eighty-nine".