443420399 has 2 divisors, whose sum is σ = 443420400. Its totient is φ = 443420398.

The previous prime is 443420389. The next prime is 443420413. The reversal of 443420399 is 993024344.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 443420399 - 2⁸ = 443420143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (443420389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221710199 + 221710200.

It is an arithmetic number, because the mean of its divisors is an integer number (221710200).

Almost surely, 2^443420399 is an apocalyptic number.

443420399 is a deficient number, since it is larger than the sum of its proper divisors (1).

443420399 is an equidigital number, since it uses as much as digits as its factorization.

443420399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 443420399 is about 21057.5496912628. The cubic root of 443420399 is about 762.5562579292.

The spelling of 443420399 in words is "four hundred forty-three million, four hundred twenty thousand, three hundred ninety-nine".