423443141278789 has 2 divisors, whose sum is σ = 423443141278790. Its totient is φ = 423443141278788.

The previous prime is 423443141278769. The next prime is 423443141278831. The reversal of 423443141278789 is 987872141344324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416674647012100 + 6768494266689 = 20412610^2 + 2601633^2 .

It is a cyclic number.

It is not a de Polignac number, because 423443141278789 - 2²³ = 423443132890181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423443141278709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211721570639394 + 211721570639395.

It is an arithmetic number, because the mean of its divisors is an integer number (211721570639395).

Almost surely, 2^{423443141278789} is an apocalyptic number.

It is an amenable number.

423443141278789 is a deficient number, since it is larger than the sum of its proper divisors (1).

423443141278789 is an equidigital number, since it uses as much as digits as its factorization.

423443141278789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 260112384, while the sum is 67.

The spelling of 423443141278789 in words is "four hundred twenty-three trillion, four hundred forty-three billion, one hundred forty-one million, two hundred seventy-eight thousand, seven hundred eighty-nine".