431491 has 4 divisors (see below), whose sum is σ = 446400. Its totient is φ = 416584.

The previous prime is 431479. The next prime is 431513. The reversal of 431491 is 194134.

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

It is a cyclic number.

It is not a de Polignac number, because 431491 - 2⁷ = 431363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431441) 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, 7411 + ... + 7468.

It is an arithmetic number, because the mean of its divisors is an integer number (111600).

2⁴³¹⁴⁹¹ is an apocalyptic number.

431491 is a deficient number, since it is larger than the sum of its proper divisors (14909).

431491 is a wasteful number, since it uses less digits than its factorization.

431491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14908.

The product of its digits is 432, while the sum is 22.

The square root of 431491 is about 656.8797454634. The cubic root of 431491 is about 75.5655615193.

The spelling of 431491 in words is "four hundred thirty-one thousand, four hundred ninety-one".