446143421 has 2 divisors, whose sum is σ = 446143422. Its totient is φ = 446143420.

The previous prime is 446143417. The next prime is 446143429. The reversal of 446143421 is 124341644.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224580196 + 221563225 = 14986^2 + 14885^2 .

It is a cyclic number.

It is not a de Polignac number, because 446143421 - 2² = 446143417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (446143429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223071710 + 223071711.

It is an arithmetic number, because the mean of its divisors is an integer number (223071711).

Almost surely, 2^446143421 is an apocalyptic number.

It is an amenable number.

446143421 is a deficient number, since it is larger than the sum of its proper divisors (1).

446143421 is an equidigital number, since it uses as much as digits as its factorization.

446143421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 29.

The square root of 446143421 is about 21122.1073995944. The cubic root of 446143421 is about 764.1140132334.

The spelling of 446143421 in words is "four hundred forty-six million, one hundred forty-three thousand, four hundred twenty-one".