143666473 has 4 divisors (see below), whose sum is σ = 152117460. Its totient is φ = 135215488.

The previous prime is 143666447. The next prime is 143666519. The reversal of 143666473 is 374666341.

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 66455104 + 77211369 = 8152^2 + 8787^2 .

It is a cyclic number.

It is not a de Polignac number, because 143666473 - 2⁹ = 143665961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143666573) 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, 4225468 + ... + 4225501.

It is an arithmetic number, because the mean of its divisors is an integer number (38029365).

Almost surely, 2^143666473 is an apocalyptic number.

It is an amenable number.

143666473 is a deficient number, since it is larger than the sum of its proper divisors (8450987).

143666473 is an equidigital number, since it uses as much as digits as its factorization.

143666473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8450986.

The product of its digits is 217728, while the sum is 40.

The square root of 143666473 is about 11986.0949854404. The cubic root of 143666473 is about 523.7432956348.

The spelling of 143666473 in words is "one hundred forty-three million, six hundred sixty-six thousand, four hundred seventy-three".