143809313 has 2 divisors, whose sum is σ = 143809314. Its totient is φ = 143809312.

The previous prime is 143809301. The next prime is 143809319. The reversal of 143809313 is 313908341.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120846049 + 22963264 = 10993^2 + 4792^2 .

It is a cyclic number.

It is not a de Polignac number, because 143809313 - 2⁶ = 143809249 is a prime.

It is a super-3 number, since 3×143809313³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 143809313.

It is not a weakly prime, because it can be changed into another prime (143809319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71904656 + 71904657.

It is an arithmetic number, because the mean of its divisors is an integer number (71904657).

Almost surely, 2^143809313 is an apocalyptic number.

It is an amenable number.

143809313 is a deficient number, since it is larger than the sum of its proper divisors (1).

143809313 is an equidigital number, since it uses as much as digits as its factorization.

143809313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 143809313 is about 11992.0520762712. The cubic root of 143809313 is about 523.9168149228.

The spelling of 143809313 in words is "one hundred forty-three million, eight hundred nine thousand, three hundred thirteen".