143808461 has 4 divisors (see below), whose sum is σ = 143863452. Its totient is φ = 143753472.

The previous prime is 143808449. The next prime is 143808487. The reversal of 143808461 is 164808341.

143808461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 100380361 + 43428100 = 10019^2 + 6590^2 .

It is a cyclic number.

It is not a de Polignac number, because 143808461 - 2²² = 139614157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143808061) 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, 23366 + ... + 28871.

It is an arithmetic number, because the mean of its divisors is an integer number (35965863).

Almost surely, 2^143808461 is an apocalyptic number.

It is an amenable number.

143808461 is a deficient number, since it is larger than the sum of its proper divisors (54991).

143808461 is an equidigital number, since it uses as much as digits as its factorization.

143808461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54990.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 143808461 is about 11992.0165526904. The cubic root of 143808461 is about 523.9157802703.

The spelling of 143808461 in words is "one hundred forty-three million, eight hundred eight thousand, four hundred sixty-one".