433628989 has 2 divisors, whose sum is σ = 433628990. Its totient is φ = 433628988.

The previous prime is 433628983. The next prime is 433628999. The reversal of 433628989 is 989826334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235100889 + 198528100 = 15333^2 + 14090^2 .

It is a cyclic number.

It is not a de Polignac number, because 433628989 - 2⁷ = 433628861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (433628983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216814494 + 216814495.

It is an arithmetic number, because the mean of its divisors is an integer number (216814495).

Almost surely, 2^433628989 is an apocalyptic number.

It is an amenable number.

433628989 is a deficient number, since it is larger than the sum of its proper divisors (1).

433628989 is an equidigital number, since it uses as much as digits as its factorization.

433628989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 52.

The square root of 433628989 is about 20823.7602031910. The cubic root of 433628989 is about 756.9016221543.

The spelling of 433628989 in words is "four hundred thirty-three million, six hundred twenty-eight thousand, nine hundred eighty-nine".