420444133 has 2 divisors, whose sum is σ = 420444134. Its totient is φ = 420444132.

The previous prime is 420444121. The next prime is 420444137. The reversal of 420444133 is 331444024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254498209 + 165945924 = 15953^2 + 12882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420444133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420444098 and 420444107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420444137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210222066 + 210222067.

It is an arithmetic number, because the mean of its divisors is an integer number (210222067).

Almost surely, 2^420444133 is an apocalyptic number.

It is an amenable number.

420444133 is a deficient number, since it is larger than the sum of its proper divisors (1).

420444133 is an equidigital number, since it uses as much as digits as its factorization.

420444133 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 420444133 is about 20504.7344045223. The cubic root of 420444133 is about 749.1511183773.

Adding to 420444133 its reverse (331444024), we get a palindrome (751888157).

The spelling of 420444133 in words is "four hundred twenty million, four hundred forty-four thousand, one hundred thirty-three".