443420431 has 2 divisors, whose sum is σ = 443420432. Its totient is φ = 443420430.

The previous prime is 443420413. The next prime is 443420437. The reversal of 443420431 is 134024344.

Together with previous prime (443420413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 443420431 - 2⁵ = 443420399 is a prime.

It is a super-2 number, since 2×443420431² = 393243357256451522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 443420396 and 443420405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (443420437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221710215 + 221710216.

It is an arithmetic number, because the mean of its divisors is an integer number (221710216).

Almost surely, 2^443420431 is an apocalyptic number.

443420431 is a deficient number, since it is larger than the sum of its proper divisors (1).

443420431 is an equidigital number, since it uses as much as digits as its factorization.

443420431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 443420431 is about 21057.5504510852. The cubic root of 443420431 is about 762.5562762728.

Adding to 443420431 its reverse (134024344), we get a palindrome (577444775).

The spelling of 443420431 in words is "four hundred forty-three million, four hundred twenty thousand, four hundred thirty-one".