143837689 has 4 divisors (see below), whose sum is σ = 144583156. Its totient is φ = 143092224.

The previous prime is 143837671. The next prime is 143837723. The reversal of 143837689 is 986738341.

It is a happy number.

143837689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 20250000 + 123587689 = 4500^2 + 11117^2 .

It is a cyclic number.

It is not a de Polignac number, because 143837689 - 2¹⁷ = 143706617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143837669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372444 + ... + 372829.

It is an arithmetic number, because the mean of its divisors is an integer number (36145789).

Almost surely, 2^143837689 is an apocalyptic number.

It is an amenable number.

143837689 is a deficient number, since it is larger than the sum of its proper divisors (745467).

143837689 is an equidigital number, since it uses as much as digits as its factorization.

143837689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745466.

The product of its digits is 870912, while the sum is 49.

The square root of 143837689 is about 11993.2351348583. The cubic root of 143837689 is about 523.9512718610.

The spelling of 143837689 in words is "one hundred forty-three million, eight hundred thirty-seven thousand, six hundred eighty-nine".