435128069 has 2 divisors, whose sum is σ = 435128070. Its totient is φ = 435128068.

The previous prime is 435128047. The next prime is 435128077. The reversal of 435128069 is 960821534.

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., 402523969 + 32604100 = 20063^2 + 5710^2 .

It is a cyclic number.

It is not a de Polignac number, because 435128069 - 2²⁸ = 166692613 is a prime.

It is a super-2 number, since 2×435128069² = 378672872863337522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (435128269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217564034 + 217564035.

It is an arithmetic number, because the mean of its divisors is an integer number (217564035).

Almost surely, 2^435128069 is an apocalyptic number.

It is an amenable number.

435128069 is a deficient number, since it is larger than the sum of its proper divisors (1).

435128069 is an equidigital number, since it uses as much as digits as its factorization.

435128069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 435128069 is about 20859.7236079484. The cubic root of 435128069 is about 757.7728362525.

The spelling of 435128069 in words is "four hundred thirty-five million, one hundred twenty-eight thousand, sixty-nine".