420144433 has 2 divisors, whose sum is σ = 420144434. Its totient is φ = 420144432.

The previous prime is 420144407. The next prime is 420144437. The reversal of 420144433 is 334441024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420127009 + 17424 = 20497^2 + 132^2 .

It is a cyclic number.

It is not a de Polignac number, because 420144433 - 2⁵ = 420144401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420144398 and 420144407.

It is not a weakly prime, because it can be changed into another prime (420144437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210072216 + 210072217.

It is an arithmetic number, because the mean of its divisors is an integer number (210072217).

Almost surely, 2^420144433 is an apocalyptic number.

It is an amenable number.

420144433 is a deficient number, since it is larger than the sum of its proper divisors (1).

420144433 is an equidigital number, since it uses as much as digits as its factorization.

420144433 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 420144433 is about 20497.4250334036. The cubic root of 420144433 is about 748.9730733521.

Adding to 420144433 its reverse (334441024), we get a palindrome (754585457).

The spelling of 420144433 in words is "four hundred twenty million, one hundred forty-four thousand, four hundred thirty-three".