423731 has 8 divisors (see below), whose sum is σ = 528384. Its totient is φ = 330120.

The previous prime is 423727. The next prime is 423749. The reversal of 423731 is 137324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 423731 - 2² = 423727 is a prime.

It is a super-2 number, since 2×423731² = 359095920722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2675 + ... + 2828.

It is an arithmetic number, because the mean of its divisors is an integer number (66048).

2⁴²³⁷³¹ is an apocalyptic number.

423731 is a deficient number, since it is larger than the sum of its proper divisors (104653).

423731 is a wasteful number, since it uses less digits than its factorization.

423731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521.

The product of its digits is 504, while the sum is 20.

The square root of 423731 is about 650.9462343389. The cubic root of 423731 is about 75.1098242884.

It can be divided in two parts, 42 and 3731, that added together give a palindrome (3773).

The spelling of 423731 in words is "four hundred twenty-three thousand, seven hundred thirty-one".