143868406681 has 2 divisors, whose sum is σ = 143868406682. Its totient is φ = 143868406680.

The previous prime is 143868406603. The next prime is 143868406697. The reversal of 143868406681 is 186604868341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71995622400 + 71872784281 = 268320^2 + 268091^2 .

It is a cyclic number.

It is not a de Polignac number, because 143868406681 - 2¹¹ = 143868404633 is a prime.

It is a super-2 number, since 2×143868406681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (143808406681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71934203340 + 71934203341.

It is an arithmetic number, because the mean of its divisors is an integer number (71934203341).

Almost surely, 2^143868406681 is an apocalyptic number.

It is an amenable number.

143868406681 is a deficient number, since it is larger than the sum of its proper divisors (1).

143868406681 is an equidigital number, since it uses as much as digits as its factorization.

143868406681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5308416, while the sum is 55.

The spelling of 143868406681 in words is "one hundred forty-three billion, eight hundred sixty-eight million, four hundred six thousand, six hundred eighty-one".