423959569 has 4 divisors (see below), whose sum is σ = 462501360. Its totient is φ = 385417780.

The previous prime is 423959551. The next prime is 423959629. The reversal of 423959569 is 965959324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 423959569 - 2⁵ = 423959537 is a prime.

It is a super-2 number, since 2×423959569² = 359483432293331522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423959539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19270879 + ... + 19270900.

It is an arithmetic number, because the mean of its divisors is an integer number (115625340).

Almost surely, 2^423959569 is an apocalyptic number.

It is an amenable number.

423959569 is a deficient number, since it is larger than the sum of its proper divisors (38541791).

423959569 is a wasteful number, since it uses less digits than its factorization.

423959569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38541790.

The product of its digits is 2624400, while the sum is 52.

The square root of 423959569 is about 20590.2785071014. The cubic root of 423959569 is about 751.2332710931.

The spelling of 423959569 in words is "four hundred twenty-three million, nine hundred fifty-nine thousand, five hundred sixty-nine".