143535161993 has 2 divisors, whose sum is σ = 143535161994. Its totient is φ = 143535161992.

The previous prime is 143535161977. The next prime is 143535162019. The reversal of 143535161993 is 399161535341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74159816329 + 69375345664 = 272323^2 + 263392^2 .

It is a cyclic number.

It is not a de Polignac number, because 143535161993 - 2⁴ = 143535161977 is a prime.

It is not a weakly prime, because it can be changed into another prime (143535151993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71767580996 + 71767580997.

It is an arithmetic number, because the mean of its divisors is an integer number (71767580997).

Almost surely, 2^143535161993 is an apocalyptic number.

It is an amenable number.

143535161993 is a deficient number, since it is larger than the sum of its proper divisors (1).

143535161993 is an equidigital number, since it uses as much as digits as its factorization.

143535161993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1312200, while the sum is 50.

The spelling of 143535161993 in words is "one hundred forty-three billion, five hundred thirty-five million, one hundred sixty-one thousand, nine hundred ninety-three".