421444033 has 2 divisors, whose sum is σ = 421444034. Its totient is φ = 421444032.

The previous prime is 421443941. The next prime is 421444061. The reversal of 421444033 is 330444124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418120704 + 3323329 = 20448^2 + 1823^2 .

It is a cyclic number.

It is not a de Polignac number, because 421444033 - 2⁹ = 421443521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421443989 and 421444007.

It is not a weakly prime, because it can be changed into another prime (421444633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210722016 + 210722017.

It is an arithmetic number, because the mean of its divisors is an integer number (210722017).

Almost surely, 2^421444033 is an apocalyptic number.

It is an amenable number.

421444033 is a deficient number, since it is larger than the sum of its proper divisors (1).

421444033 is an equidigital number, since it uses as much as digits as its factorization.

421444033 is an odious number, because the sum of its binary digits is odd.

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

The square root of 421444033 is about 20529.1020992152. The cubic root of 421444033 is about 749.7445251348.

Adding to 421444033 its reverse (330444124), we get a palindrome (751888157).

Subtracting from 421444033 its reverse (330444124), we obtain a palindrome (90999909).

The spelling of 421444033 in words is "four hundred twenty-one million, four hundred forty-four thousand, thirty-three".