143797993 has 2 divisors, whose sum is σ = 143797994. Its totient is φ = 143797992.

The previous prime is 143797967. The next prime is 143797999. The reversal of 143797993 is 399797341.

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., 143712144 + 85849 = 11988^2 + 293^2 .

It is a cyclic number.

It is not a de Polignac number, because 143797993 - 2⁹ = 143797481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143797993.

It is not a weakly prime, because it can be changed into another prime (143797999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71898996 + 71898997.

It is an arithmetic number, because the mean of its divisors is an integer number (71898997).

Almost surely, 2^143797993 is an apocalyptic number.

It is an amenable number.

143797993 is a deficient number, since it is larger than the sum of its proper divisors (1).

143797993 is an equidigital number, since it uses as much as digits as its factorization.

143797993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1285956, while the sum is 52.

The square root of 143797993 is about 11991.5800877115. The cubic root of 143797993 is about 523.9030677974.

The spelling of 143797993 in words is "one hundred forty-three million, seven hundred ninety-seven thousand, nine hundred ninety-three".