143571689 has 2 divisors, whose sum is σ = 143571690. Its totient is φ = 143571688.

The previous prime is 143571629. The next prime is 143571691. The reversal of 143571689 is 986175341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90573289 + 52998400 = 9517^2 + 7280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143571689 is a prime.

It is a super-2 number, since 2×143571689² = 41225659764625442, which contains 22 as substring.

Together with 143571691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (143571629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71785844 + 71785845.

It is an arithmetic number, because the mean of its divisors is an integer number (71785845).

Almost surely, 2^143571689 is an apocalyptic number.

It is an amenable number.

143571689 is a deficient number, since it is larger than the sum of its proper divisors (1).

143571689 is an equidigital number, since it uses as much as digits as its factorization.

143571689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 143571689 is about 11982.1404181390. The cubic root of 143571689 is about 523.6280903617.

The spelling of 143571689 in words is "one hundred forty-three million, five hundred seventy-one thousand, six hundred eighty-nine".