143561329 has 2 divisors, whose sum is σ = 143561330. Its totient is φ = 143561328.

The previous prime is 143561323. The next prime is 143561371. The reversal of 143561329 is 923165341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140375104 + 3186225 = 11848^2 + 1785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143561329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 143561294 and 143561303.

It is not a weakly prime, because it can be changed into another prime (143561323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71780664 + 71780665.

It is an arithmetic number, because the mean of its divisors is an integer number (71780665).

Almost surely, 2^143561329 is an apocalyptic number.

It is an amenable number.

143561329 is a deficient number, since it is larger than the sum of its proper divisors (1).

143561329 is an equidigital number, since it uses as much as digits as its factorization.

143561329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 34.

The square root of 143561329 is about 11981.7081002668. The cubic root of 143561329 is about 523.6154952195.

The spelling of 143561329 in words is "one hundred forty-three million, five hundred sixty-one thousand, three hundred twenty-nine".