27428207 has 2 divisors, whose sum is σ = 27428208. Its totient is φ = 27428206.

The previous prime is 27428161. The next prime is 27428209. The reversal of 27428207 is 70282472.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27428207 - 2⁸ = 27427951 is a prime.

Together with 27428209, 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 (27428209) 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, 13714103 + 13714104.

It is an arithmetic number, because the mean of its divisors is an integer number (13714104).

Almost surely, 2^27428207 is an apocalyptic number.

27428207 is a deficient number, since it is larger than the sum of its proper divisors (1).

27428207 is an equidigital number, since it uses as much as digits as its factorization.

27428207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 27428207 is about 5237.1945734334. The cubic root of 27428207 is about 301.5776408069.

The spelling of 27428207 in words is "twenty-seven million, four hundred twenty-eight thousand, two hundred seven".