143985889 has 2 divisors, whose sum is σ = 143985890. Its totient is φ = 143985888.

The previous prime is 143985871. The next prime is 143985929. The reversal of 143985889 is 988589341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88736400 + 55249489 = 9420^2 + 7433^2 .

It is an emirp because it is prime and its reverse (988589341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143985889 - 2¹³ = 143977697 is a prime.

It is a super-2 number, since 2×143985889² = 41463872462240642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (143985859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71992944 + 71992945.

It is an arithmetic number, because the mean of its divisors is an integer number (71992945).

Almost surely, 2^143985889 is an apocalyptic number.

It is an amenable number.

143985889 is a deficient number, since it is larger than the sum of its proper divisors (1).

143985889 is an equidigital number, since it uses as much as digits as its factorization.

143985889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 55.

The square root of 143985889 is about 11999.4120272620. The cubic root of 143985889 is about 524.1311573187.

The spelling of 143985889 in words is "one hundred forty-three million, nine hundred eighty-five thousand, eight hundred eighty-nine".