428775133 has 2 divisors, whose sum is σ = 428775134. Its totient is φ = 428775132.

The previous prime is 428775091. The next prime is 428775157. The reversal of 428775133 is 331577824.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291111844 + 137663289 = 17062^2 + 11733^2 .

It is a cyclic number.

It is not a de Polignac number, because 428775133 - 2¹⁷ = 428644061 is a prime.

It is a super-2 number, since 2×428775133² = 367696229358335378, which contains 22 as substring.

It is equal to p_22786546 and since 428775133 and 22786546 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428775163) 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, 214387566 + 214387567.

It is an arithmetic number, because the mean of its divisors is an integer number (214387567).

Almost surely, 2^428775133 is an apocalyptic number.

It is an amenable number.

428775133 is a deficient number, since it is larger than the sum of its proper divisors (1).

428775133 is an equidigital number, since it uses as much as digits as its factorization.

428775133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 428775133 is about 20706.8861251517. The cubic root of 428775133 is about 754.0668752116.

The spelling of 428775133 in words is "four hundred twenty-eight million, seven hundred seventy-five thousand, one hundred thirty-three".