27873689 has 2 divisors, whose sum is σ = 27873690. Its totient is φ = 27873688.

The previous prime is 27873683. The next prime is 27873719. The reversal of 27873689 is 98637872.

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., 26183689 + 1690000 = 5117^2 + 1300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27873689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27873683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13936844 + 13936845.

It is an arithmetic number, because the mean of its divisors is an integer number (13936845).

Almost surely, 2^27873689 is an apocalyptic number.

It is an amenable number.

27873689 is a deficient number, since it is larger than the sum of its proper divisors (1).

27873689 is an equidigital number, since it uses as much as digits as its factorization.

27873689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 50.

The square root of 27873689 is about 5279.5538637275. The cubic root of 27873689 is about 303.2015962455.

The spelling of 27873689 in words is "twenty-seven million, eight hundred seventy-three thousand, six hundred eighty-nine".