143427689 has 4 divisors (see below), whose sum is σ = 143512656. Its totient is φ = 143342724.

The previous prime is 143427679. The next prime is 143427719. The reversal of 143427689 is 986724341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143427689 - 2⁸ = 143427433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143427659) 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, 39899 + ... + 43344.

It is an arithmetic number, because the mean of its divisors is an integer number (35878164).

Almost surely, 2^143427689 is an apocalyptic number.

It is an amenable number.

143427689 is a deficient number, since it is larger than the sum of its proper divisors (84967).

143427689 is an equidigital number, since it uses as much as digits as its factorization.

143427689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84966.

The product of its digits is 290304, while the sum is 44.

The square root of 143427689 is about 11976.1299675646. The cubic root of 143427689 is about 523.4529683983.

The spelling of 143427689 in words is "one hundred forty-three million, four hundred twenty-seven thousand, six hundred eighty-nine".