681468143 has 4 divisors (see below), whose sum is σ = 681598920. Its totient is φ = 681337368.

The previous prime is 681468121. The next prime is 681468167. The reversal of 681468143 is 341864186.

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

It is a cyclic number.

It is not a de Polignac number, because 681468143 - 2¹⁰ = 681467119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 681468143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681468643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57233 + ... + 68106.

It is an arithmetic number, because the mean of its divisors is an integer number (170399730).

Almost surely, 2^681468143 is an apocalyptic number.

681468143 is a deficient number, since it is larger than the sum of its proper divisors (130777).

681468143 is a wasteful number, since it uses less digits than its factorization.

681468143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130776.

The product of its digits is 110592, while the sum is 41.

The square root of 681468143 is about 26104.9447997884. The cubic root of 681468143 is about 879.9983397868.

The spelling of 681468143 in words is "six hundred eighty-one million, four hundred sixty-eight thousand, one hundred forty-three".