143305013 has 2 divisors, whose sum is σ = 143305014. Its totient is φ = 143305012.

The previous prime is 143305007. The next prime is 143305039. The reversal of 143305013 is 310503341.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110208004 + 33097009 = 10498^2 + 5753^2 .

It is a cyclic number.

It is not a de Polignac number, because 143305013 - 2²⁶ = 76196149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143305003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71652506 + 71652507.

It is an arithmetic number, because the mean of its divisors is an integer number (71652507).

Almost surely, 2^143305013 is an apocalyptic number.

It is an amenable number.

143305013 is a deficient number, since it is larger than the sum of its proper divisors (1).

143305013 is an equidigital number, since it uses as much as digits as its factorization.

143305013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 143305013 is about 11971.0071840259. The cubic root of 143305013 is about 523.3036865928.

Adding to 143305013 its reverse (310503341), we get a palindrome (453808354).

The spelling of 143305013 in words is "one hundred forty-three million, three hundred five thousand, thirteen".