1423789 has 2 divisors, whose sum is σ = 1423790. Its totient is φ = 1423788.

The previous prime is 1423781. The next prime is 1423819. The reversal of 1423789 is 9873241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1357225 + 66564 = 1165^2 + 258^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423789 - 2³ = 1423781 is a prime.

1423789 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423781) 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, 711894 + 711895.

It is an arithmetic number, because the mean of its divisors is an integer number (711895).

2^1423789 is an apocalyptic number.

It is an amenable number.

1423789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423789 is an equidigital number, since it uses as much as digits as its factorization.

1423789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 1423789 is about 1193.2262987380. The cubic root of 1423789 is about 112.4989695379.

The spelling of 1423789 in words is "one million, four hundred twenty-three thousand, seven hundred eighty-nine".