143471989 has 2 divisors, whose sum is σ = 143471990. Its totient is φ = 143471988.

The previous prime is 143471969. The next prime is 143472031. The reversal of 143471989 is 989174341.

143471989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111999889 + 31472100 = 10583^2 + 5610^2 .

It is an emirp because it is prime and its reverse (989174341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143471989 - 2²¹ = 141374837 is a prime.

It is a super-2 number, since 2×143471989² = 41168423255232242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143471969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71735994 + 71735995.

It is an arithmetic number, because the mean of its divisors is an integer number (71735995).

Almost surely, 2^143471989 is an apocalyptic number.

It is an amenable number.

143471989 is a deficient number, since it is larger than the sum of its proper divisors (1).

143471989 is an equidigital number, since it uses as much as digits as its factorization.

143471989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 143471989 is about 11977.9793371002. The cubic root of 143471989 is about 523.5068552027.

The spelling of 143471989 in words is "one hundred forty-three million, four hundred seventy-one thousand, nine hundred eighty-nine".