429980809 has 4 divisors (see below), whose sum is σ = 430938900. Its totient is φ = 429022720.

The previous prime is 429980717. The next prime is 429980827. The reversal of 429980809 is 908089924.

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 167443600 + 262537209 = 12940^2 + 16203^2 .

It is a cyclic number.

It is not a de Polignac number, because 429980809 - 2¹⁵ = 429948041 is a prime.

It is a super-2 number, since 2×429980809² = 369766992216588962, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (429980869) 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, 478372 + ... + 479269.

It is an arithmetic number, because the mean of its divisors is an integer number (107734725).

Almost surely, 2^429980809 is an apocalyptic number.

It is an amenable number.

429980809 is a deficient number, since it is larger than the sum of its proper divisors (958091).

429980809 is an equidigital number, since it uses as much as digits as its factorization.

429980809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958090.

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 429980809 is about 20735.9786120646. The cubic root of 429980809 is about 754.7730025298.

The spelling of 429980809 in words is "four hundred twenty-nine million, nine hundred eighty thousand, eight hundred nine".