143090821 has 2 divisors, whose sum is σ = 143090822. Its totient is φ = 143090820.

The previous prime is 143090791. The next prime is 143090837. The reversal of 143090821 is 128090341.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141372100 + 1718721 = 11890^2 + 1311^2 .

It is an emirp because it is prime and its reverse (128090341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143090821 - 2⁷ = 143090693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143090821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143090851) 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 as a sum of consecutive naturals, namely, 71545410 + 71545411.

It is an arithmetic number, because the mean of its divisors is an integer number (71545411).

Almost surely, 2^143090821 is an apocalyptic number.

It is an amenable number.

143090821 is a deficient number, since it is larger than the sum of its proper divisors (1).

143090821 is an equidigital number, since it uses as much as digits as its factorization.

143090821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 143090821 is about 11962.0575571262. The cubic root of 143090821 is about 523.0428365558.

The spelling of 143090821 in words is "one hundred forty-three million, ninety thousand, eight hundred twenty-one".