431403 has 8 divisors (see below), whose sum is σ = 657408. Its totient is φ = 246504.

The previous prime is 431399. The next prime is 431423. The reversal of 431403 is 304134.

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

It is not a de Polignac number, because 431403 - 2² = 431399 is a prime.

It is a super-2 number, since 2×431403² = 372217096818, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 431403.

It is not an unprimeable number, because it can be changed into a prime (431423) 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, 10251 + ... + 10292.

It is an arithmetic number, because the mean of its divisors is an integer number (82176).

2⁴³¹⁴⁰³ is an apocalyptic number.

431403 is a deficient number, since it is larger than the sum of its proper divisors (226005).

431403 is a wasteful number, since it uses less digits than its factorization.

431403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20553.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 431403 is about 656.8127587068. The cubic root of 431403 is about 75.5604241224.

Adding to 431403 its reverse (304134), we get a palindrome (735537).

The spelling of 431403 in words is "four hundred thirty-one thousand, four hundred three".