443990429 has 2 divisors, whose sum is σ = 443990430. Its totient is φ = 443990428.

The previous prime is 443990363. The next prime is 443990431. The reversal of 443990429 is 924099344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253605625 + 190384804 = 15925^2 + 13798^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-443990429 is a prime.

It is a Sophie Germain prime.

Together with 443990431, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 443990429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (443990929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221995214 + 221995215.

It is an arithmetic number, because the mean of its divisors is an integer number (221995215).

Almost surely, 2^443990429 is an apocalyptic number.

It is an amenable number.

443990429 is a deficient number, since it is larger than the sum of its proper divisors (1).

443990429 is an equidigital number, since it uses as much as digits as its factorization.

443990429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 443990429 is about 21071.0803947021. The cubic root of 443990429 is about 762.8828808608.

The spelling of 443990429 in words is "four hundred forty-three million, nine hundred ninety thousand, four hundred twenty-nine".