143473681 has 4 divisors (see below), whose sum is σ = 154510132. Its totient is φ = 132437232.

The previous prime is 143473669. The next prime is 143473709. The reversal of 143473681 is 186374341.

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 95863681 + 47610000 = 9791^2 + 6900^2 .

It is a cyclic number.

It is not a de Polignac number, because 143473681 - 2⁷ = 143473553 is a prime.

It is a super-2 number, since 2×143473681² = 41169394279379522, which contains 22 as substring.

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 143473681.

It is not an unprimeable number, because it can be changed into a prime (143473621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5518206 + ... + 5518231.

It is an arithmetic number, because the mean of its divisors is an integer number (38627533).

Almost surely, 2^143473681 is an apocalyptic number.

It is an amenable number.

143473681 is a deficient number, since it is larger than the sum of its proper divisors (11036451).

143473681 is a wasteful number, since it uses less digits than its factorization.

143473681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11036450.

The product of its digits is 48384, while the sum is 37.

The square root of 143473681 is about 11978.0499665012. The cubic root of 143473681 is about 523.5089131425.

The spelling of 143473681 in words is "one hundred forty-three million, four hundred seventy-three thousand, six hundred eighty-one".