143783561 has 2 divisors, whose sum is σ = 143783562. Its totient is φ = 143783560.

The previous prime is 143783551. The next prime is 143783617. The reversal of 143783561 is 165387341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83814025 + 59969536 = 9155^2 + 7744^2 .

It is a cyclic number.

It is not a de Polignac number, because 143783561 - 2¹⁰ = 143782537 is a prime.

It is not a weakly prime, because it can be changed into another prime (143783551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71891780 + 71891781.

It is an arithmetic number, because the mean of its divisors is an integer number (71891781).

Almost surely, 2^143783561 is an apocalyptic number.

It is an amenable number.

143783561 is a deficient number, since it is larger than the sum of its proper divisors (1).

143783561 is an equidigital number, since it uses as much as digits as its factorization.

143783561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 143783561 is about 11990.9783170515. The cubic root of 143783561 is about 523.8855403807.

The spelling of 143783561 in words is "one hundred forty-three million, seven hundred eighty-three thousand, five hundred sixty-one".