143368681 has 4 divisors (see below), whose sum is σ = 144684100. Its totient is φ = 142053264.

The previous prime is 143368679. The next prime is 143368697. The reversal of 143368681 is 186863341.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52070656 + 91298025 = 7216^2 + 9555^2 .

It is a cyclic number.

It is not a de Polignac number, because 143368681 - 2¹ = 143368679 is a prime.

It is a super-2 number, since 2×143368681² = 41109157383359522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143368601) 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 in 3 ways as a sum of consecutive naturals, for example, 657546 + ... + 657763.

It is an arithmetic number, because the mean of its divisors is an integer number (36171025).

Almost surely, 2^143368681 is an apocalyptic number.

It is an amenable number.

143368681 is a deficient number, since it is larger than the sum of its proper divisors (1315419).

143368681 is a wasteful number, since it uses less digits than its factorization.

143368681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315418.

The product of its digits is 82944, while the sum is 40.

The square root of 143368681 is about 11973.6661470078. Note that the first 3 decimals coincide. The cubic root of 143368681 is about 523.3811734522.

The spelling of 143368681 in words is "one hundred forty-three million, three hundred sixty-eight thousand, six hundred eighty-one".