429530809 has 4 divisors (see below), whose sum is σ = 430169716. Its totient is φ = 428891904.

The previous prime is 429530779. The next prime is 429530813. The reversal of 429530809 is 908035924.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 139169209 + 290361600 = 11797^2 + 17040^2 .

It is a cyclic number.

It is not a de Polignac number, because 429530809 - 2¹¹ = 429528761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (429530869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318444 + ... + 319789.

It is an arithmetic number, because the mean of its divisors is an integer number (107542429).

Almost surely, 2^429530809 is an apocalyptic number.

It is an amenable number.

429530809 is a deficient number, since it is larger than the sum of its proper divisors (638907).

429530809 is an equidigital number, since it uses as much as digits as its factorization.

429530809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638906.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 429530809 is about 20725.1250659676. The cubic root of 429530809 is about 754.5096059626.

The spelling of 429530809 in words is "four hundred twenty-nine million, five hundred thirty thousand, eight hundred nine".