143689609 has 12 divisors (see below), whose sum is σ = 175947600. Its totient is φ = 116679528.

The previous prime is 143689597. The next prime is 143689613. The reversal of 143689609 is 906986341.

It is not a de Polignac number, because 143689609 - 2¹⁵ = 143656841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143689649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76239 + ... + 78100.

It is an arithmetic number, because the mean of its divisors is an integer number (14662300).

Almost surely, 2^143689609 is an apocalyptic number.

143689609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

143689609 is a deficient number, since it is larger than the sum of its proper divisors (32257991).

143689609 is a wasteful number, since it uses less digits than its factorization.

143689609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154372 (or 154365 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 143689609 is about 11987.0600649200. The cubic root of 143689609 is about 523.7714086065.

The spelling of 143689609 in words is "one hundred forty-three million, six hundred eighty-nine thousand, six hundred nine".