143477561 has 2 divisors, whose sum is σ = 143477562. Its totient is φ = 143477560.

The previous prime is 143477539. The next prime is 143477563. The reversal of 143477561 is 165774341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88717561 + 54760000 = 9419^2 + 7400^2 .

It is an emirp because it is prime and its reverse (165774341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143477561 - 2¹⁰ = 143476537 is a prime.

Together with 143477563, 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 (143477563) 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, 71738780 + 71738781.

It is an arithmetic number, because the mean of its divisors is an integer number (71738781).

Almost surely, 2^143477561 is an apocalyptic number.

It is an amenable number.

143477561 is a deficient number, since it is larger than the sum of its proper divisors (1).

143477561 is an equidigital number, since it uses as much as digits as its factorization.

143477561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 38.

The square root of 143477561 is about 11978.2119283305. The cubic root of 143477561 is about 523.5136322339.

The spelling of 143477561 in words is "one hundred forty-three million, four hundred seventy-seven thousand, five hundred sixty-one".