431687 has 6 divisors (see below), whose sum is σ = 453768. Its totient is φ = 409904.

The previous prime is 431671. The next prime is 431693. The reversal of 431687 is 786134.

It is not a de Polignac number, because 431687 - 2⁴ = 431671 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 431687.

It is not an unprimeable number, because it can be changed into a prime (431617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3083 + ... + 3219.

It is an arithmetic number, because the mean of its divisors is an integer number (75628).

2⁴³¹⁶⁸⁷ is an apocalyptic number.

431687 is a deficient number, since it is larger than the sum of its proper divisors (22081).

431687 is an equidigital number, since it uses as much as digits as its factorization.

431687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 160 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 431687 is about 657.0289186938. The cubic root of 431687 is about 75.5770013933.

The spelling of 431687 in words is "four hundred thirty-one thousand, six hundred eighty-seven".