423289 has 2 divisors, whose sum is σ = 423290. Its totient is φ = 423288.

The previous prime is 423287. The next prime is 423299. The reversal of 423289 is 982324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409600 + 13689 = 640^2 + 117^2 .

It is a cyclic number.

It is not a de Polignac number, because 423289 - 2¹ = 423287 is a prime.

Together with 423287, it forms a pair of twin primes.

It is an Ulam number.

423289 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (423281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211644 + 211645.

It is an arithmetic number, because the mean of its divisors is an integer number (211645).

2⁴²³²⁸⁹ is an apocalyptic number.

It is an amenable number.

423289 is a deficient number, since it is larger than the sum of its proper divisors (1).

423289 is an equidigital number, since it uses as much as digits as its factorization.

423289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 423289 is about 650.6066399907. The cubic root of 423289 is about 75.0836991505.

The spelling of 423289 in words is "four hundred twenty-three thousand, two hundred eighty-nine".