431009 has 4 divisors (see below), whose sum is σ = 432816. Its totient is φ = 429204.

The previous prime is 430999. The next prime is 431017. The reversal of 431009 is 900134.

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, and also an emirpimes, since its reverse is a distinct semiprime: 900134 = 2 ⋅450067.

It is a cyclic number.

It is not a de Polignac number, because 431009 - 2⁸ = 430753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431029) 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, 479 + ... + 1044.

It is an arithmetic number, because the mean of its divisors is an integer number (108204).

2⁴³¹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

431009 is a deficient number, since it is larger than the sum of its proper divisors (1807).

431009 is a wasteful number, since it uses less digits than its factorization.

431009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 431009 is about 656.5127569210. The cubic root of 431009 is about 75.5374140252.

It can be divided in two parts, 4 and 31009, that added together give a palindrome (31013).

The spelling of 431009 in words is "four hundred thirty-one thousand, nine".