428665033 has 2 divisors, whose sum is σ = 428665034. Its totient is φ = 428665032.

The previous prime is 428664989. The next prime is 428665049. The reversal of 428665033 is 330566824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218211984 + 210453049 = 14772^2 + 14507^2 .

It is a cyclic number.

It is not a de Polignac number, because 428665033 - 2⁹ = 428664521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428664983 and 428665001.

It is not a weakly prime, because it can be changed into another prime (428665093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214332516 + 214332517.

It is an arithmetic number, because the mean of its divisors is an integer number (214332517).

Almost surely, 2^428665033 is an apocalyptic number.

It is an amenable number.

428665033 is a deficient number, since it is larger than the sum of its proper divisors (1).

428665033 is an equidigital number, since it uses as much as digits as its factorization.

428665033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 428665033 is about 20704.2274185732. The cubic root of 428665033 is about 754.0023271041.

The spelling of 428665033 in words is "four hundred twenty-eight million, six hundred sixty-five thousand, thirty-three".