431023 has 4 divisors (see below), whose sum is σ = 432640. Its totient is φ = 429408.

The previous prime is 431021. The next prime is 431029. The reversal of 431023 is 320134.

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 431023 - 2¹ = 431021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 430994 and 431012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431021) 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, 303 + ... + 976.

It is an arithmetic number, because the mean of its divisors is an integer number (108160).

2⁴³¹⁰²³ is an apocalyptic number.

431023 is a deficient number, since it is larger than the sum of its proper divisors (1617).

431023 is a wasteful number, since it uses less digits than its factorization.

431023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 431023 is about 656.5234192319. The cubic root of 431023 is about 75.5382318831.

Adding to 431023 its reverse (320134), we get a palindrome (751157).

Subtracting from 431023 its reverse (320134), we obtain a square (110889 = 333²).

The spelling of 431023 in words is "four hundred thirty-one thousand, twenty-three".