431679 has 8 divisors (see below), whose sum is σ = 591280. Its totient is φ = 279936.

The previous prime is 431671. The next prime is 431693. The reversal of 431679 is 976134.

It is a happy number.

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

It is not a de Polignac number, because 431679 - 2³ = 431671 is a prime.

It is a Duffinian number.

431679 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431671) 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, 1834 + ... + 2055.

It is an arithmetic number, because the mean of its divisors is an integer number (73910).

2⁴³¹⁶⁷⁹ is an apocalyptic number.

431679 is a deficient number, since it is larger than the sum of its proper divisors (159601).

431679 is a wasteful number, since it uses less digits than its factorization.

431679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929.

The product of its digits is 4536, while the sum is 30.

The square root of 431679 is about 657.0228306535. The cubic root of 431679 is about 75.5765345274.

Subtracting from 431679 its sum of digits (30), we obtain a square (431649 = 657²).

The spelling of 431679 in words is "four hundred thirty-one thousand, six hundred seventy-nine".