27812429 has 2 divisors, whose sum is σ = 27812430. Its totient is φ = 27812428.

The previous prime is 27812417. The next prime is 27812431. The reversal of 27812429 is 92421872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23990404 + 3822025 = 4898^2 + 1955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27812429 is a prime.

Together with 27812431, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27812329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13906214 + 13906215.

It is an arithmetic number, because the mean of its divisors is an integer number (13906215).

Almost surely, 2^27812429 is an apocalyptic number.

It is an amenable number.

27812429 is a deficient number, since it is larger than the sum of its proper divisors (1).

27812429 is an equidigital number, since it uses as much as digits as its factorization.

27812429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 27812429 is about 5273.7490459824. The cubic root of 27812429 is about 302.9793107100.

The spelling of 27812429 in words is "twenty-seven million, eight hundred twelve thousand, four hundred twenty-nine".