423687 has 16 divisors (see below), whose sum is σ = 634752. Its totient is φ = 249120.

The previous prime is 423667. The next prime is 423697. The reversal of 423687 is 786324.

It is not a de Polignac number, because 423687 - 2⁷ = 423559 is a prime.

423687 is a lucky number.

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 423687.

It is not an unprimeable number, because it can be changed into a prime (423617) 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 15 ways as a sum of consecutive naturals, for example, 1048 + ... + 1394.

It is an arithmetic number, because the mean of its divisors is an integer number (39672).

2⁴²³⁶⁸⁷ is an apocalyptic number.

423687 is a deficient number, since it is larger than the sum of its proper divisors (211065).

423687 is a wasteful number, since it uses less digits than its factorization.

423687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398.

The product of its digits is 8064, while the sum is 30.

The square root of 423687 is about 650.9124365074. The cubic root of 423687 is about 75.1072244104.

The spelling of 423687 in words is "four hundred twenty-three thousand, six hundred eighty-seven".