143834989 has 4 divisors (see below), whose sum is σ = 143869824. Its totient is φ = 143800156.

The previous prime is 143834969. The next prime is 143835001. The reversal of 143834989 is 989438341.

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 143834989 - 2²⁵ = 110280557 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143834969) 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, 10237 + ... + 19810.

It is an arithmetic number, because the mean of its divisors is an integer number (35967456).

Almost surely, 2^143834989 is an apocalyptic number.

It is an amenable number.

143834989 is a deficient number, since it is larger than the sum of its proper divisors (34835).

143834989 is an equidigital number, since it uses as much as digits as its factorization.

143834989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34834.

The product of its digits is 746496, while the sum is 49.

The square root of 143834989 is about 11993.1225708737. The cubic root of 143834989 is about 523.9479934498.

The spelling of 143834989 in words is "one hundred forty-three million, eight hundred thirty-four thousand, nine hundred eighty-nine".