143648789 has 4 divisors (see below), whose sum is σ = 147152460. Its totient is φ = 140145120.

The previous prime is 143648719. The next prime is 143648801. The reversal of 143648789 is 987846341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51008164 + 92640625 = 7142^2 + 9625^2 .

It is a cyclic number.

It is not a de Polignac number, because 143648789 - 2²⁴ = 126871573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143648719) 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 in 3 ways as a sum of consecutive naturals, for example, 1751774 + ... + 1751855.

It is an arithmetic number, because the mean of its divisors is an integer number (36788115).

Almost surely, 2^143648789 is an apocalyptic number.

It is an amenable number.

143648789 is a deficient number, since it is larger than the sum of its proper divisors (3503671).

143648789 is an equidigital number, since it uses as much as digits as its factorization.

143648789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503670.

The product of its digits is 1161216, while the sum is 50.

The square root of 143648789 is about 11985.3572746080. The cubic root of 143648789 is about 523.7218054515.

The spelling of 143648789 in words is "one hundred forty-three million, six hundred forty-eight thousand, seven hundred eighty-nine".