431434209 has 4 divisors (see below), whose sum is σ = 575245616. Its totient is φ = 287622804.

The previous prime is 431434183. The next prime is 431434229. The reversal of 431434209 is 902434134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 431434209 - 2¹⁶ = 431368673 is a prime.

It is a super-2 number, since 2×431434209² = 372270953390911362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431434229) 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, 71905699 + ... + 71905704.

It is an arithmetic number, because the mean of its divisors is an integer number (143811404).

Almost surely, 2^431434209 is an apocalyptic number.

It is an amenable number.

431434209 is a deficient number, since it is larger than the sum of its proper divisors (143811407).

431434209 is a wasteful number, since it uses less digits than its factorization.

431434209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143811406.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 431434209 is about 20770.9944152898. The cubic root of 431434209 is about 755.6224616846.

The spelling of 431434209 in words is "four hundred thirty-one million, four hundred thirty-four thousand, two hundred nine".