143685613 has 2 divisors, whose sum is σ = 143685614. Its totient is φ = 143685612.

The previous prime is 143685569. The next prime is 143685677. The reversal of 143685613 is 316586341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136492489 + 7193124 = 11683^2 + 2682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143685613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143685313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71842806 + 71842807.

It is an arithmetic number, because the mean of its divisors is an integer number (71842807).

Almost surely, 2^143685613 is an apocalyptic number.

It is an amenable number.

143685613 is a deficient number, since it is larger than the sum of its proper divisors (1).

143685613 is an equidigital number, since it uses as much as digits as its factorization.

143685613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 143685613 is about 11986.8933840257. The cubic root of 143685613 is about 523.7665532103.

The spelling of 143685613 in words is "one hundred forty-three million, six hundred eighty-five thousand, six hundred thirteen".