423979289 has 2 divisors, whose sum is σ = 423979290. Its totient is φ = 423979288.

The previous prime is 423979253. The next prime is 423979313. The reversal of 423979289 is 982979324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373455625 + 50523664 = 19325^2 + 7108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423979289 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423979289.

It is not a weakly prime, because it can be changed into another prime (423979249) 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, 211989644 + 211989645.

It is an arithmetic number, because the mean of its divisors is an integer number (211989645).

Almost surely, 2^423979289 is an apocalyptic number.

It is an amenable number.

423979289 is a deficient number, since it is larger than the sum of its proper divisors (1).

423979289 is an equidigital number, since it uses as much as digits as its factorization.

423979289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 53.

The square root of 423979289 is about 20590.7573682951. The cubic root of 423979289 is about 751.2449185013.

The spelling of 423979289 in words is "four hundred twenty-three million, nine hundred seventy-nine thousand, two hundred eighty-nine".