143018989 has 4 divisors (see below), whose sum is σ = 146345056. Its totient is φ = 139692924.

The previous prime is 143018987. The next prime is 143018999. The reversal of 143018989 is 989810341.

143018989 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, 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 143018989 - 2¹ = 143018987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 3326023 = 143018989 / (1 + 4 + 3 + 0 + 1 + 8 + 9 + 8 + 9).

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 (143018987) 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, 1662969 + ... + 1663054.

It is an arithmetic number, because the mean of its divisors is an integer number (36586264).

Almost surely, 2^143018989 is an apocalyptic number.

It is an amenable number.

143018989 is a deficient number, since it is larger than the sum of its proper divisors (3326067).

143018989 is an equidigital number, since it uses as much as digits as its factorization.

143018989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326066.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 143018989 is about 11959.0546867217. The cubic root of 143018989 is about 522.9552989079.

The spelling of 143018989 in words is "one hundred forty-three million, eighteen thousand, nine hundred eighty-nine".