427309 has 2 divisors, whose sum is σ = 427310. Its totient is φ = 427308.

The previous prime is 427307. The next prime is 427327. The reversal of 427309 is 903724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426409 + 900 = 653^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 427309 - 2¹ = 427307 is a prime.

Together with 427307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213654 + 213655.

It is an arithmetic number, because the mean of its divisors is an integer number (213655).

2⁴²⁷³⁰⁹ is an apocalyptic number.

It is an amenable number.

427309 is a deficient number, since it is larger than the sum of its proper divisors (1).

427309 is an equidigital number, since it uses as much as digits as its factorization.

427309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 427309 is about 653.6887638624. The cubic root of 427309 is about 75.3206420437.

The spelling of 427309 in words is "four hundred twenty-seven thousand, three hundred nine".