143423009 has 12 divisors (see below), whose sum is σ = 155116500. Its totient is φ = 132442464.

The previous prime is 143422987. The next prime is 143423011. The reversal of 143423009 is 900324341.

It can be written as a sum of positive squares in 2 ways, for example, as 101949409 + 41473600 = 10097^2 + 6440^2 .

It is a de Polignac number, because none of the positive numbers 2^k-143423009 is a prime.

It is a super-2 number, since 2×143423009² = 41140319021228162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (143423029) 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 11 ways as a sum of consecutive naturals, for example, 10667 + ... + 20015.

It is an arithmetic number, because the mean of its divisors is an integer number (12926375).

Almost surely, 2^143423009 is an apocalyptic number.

It is an amenable number.

143423009 is a deficient number, since it is larger than the sum of its proper divisors (11693491).

143423009 is an equidigital number, since it uses as much as digits as its factorization.

143423009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9424 (or 9401 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 143423009 is about 11975.9345773096. The cubic root of 143423009 is about 523.4472749683.

The spelling of 143423009 in words is "one hundred forty-three million, four hundred twenty-three thousand, nine".