143909389 has 8 divisors (see below), whose sum is σ = 155129912. Its totient is φ = 132710400.

The previous prime is 143909387. The next prime is 143909393. The reversal of 143909389 is 983909341.

It can be written as a sum of positive squares in 4 ways, for example, as 32775625 + 111133764 = 5725^2 + 10542^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 143909389 - 2¹ = 143909387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143909387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10189 + ... + 19789.

It is an arithmetic number, because the mean of its divisors is an integer number (19391239).

Almost surely, 2^143909389 is an apocalyptic number.

It is an amenable number.

143909389 is a deficient number, since it is larger than the sum of its proper divisors (11220523).

143909389 is a wasteful number, since it uses less digits than its factorization.

143909389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10767.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 143909389 is about 11996.2239475595. The cubic root of 143909389 is about 524.0383168861.

The spelling of 143909389 in words is "one hundred forty-three million, nine hundred nine thousand, three hundred eighty-nine".