806431 has 4 divisors (see below), whose sum is σ = 817552. Its totient is φ = 795312.

The previous prime is 806389. The next prime is 806447. The reversal of 806431 is 134608.

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 806431 - 2¹¹ = 804383 is a prime.

It is a super-2 number, since 2×806431² = 1300661915522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5451 + ... + 5596.

It is an arithmetic number, because the mean of its divisors is an integer number (204388).

2⁸⁰⁶⁴³¹ is an apocalyptic number.

806431 is a deficient number, since it is larger than the sum of its proper divisors (11121).

806431 is a wasteful number, since it uses less digits than its factorization.

806431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11120.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 806431 is about 898.0150332817. The cubic root of 806431 is about 93.0798635671.

The spelling of 806431 in words is "eight hundred six thousand, four hundred thirty-one".