431997 has 4 divisors (see below), whose sum is σ = 576000. Its totient is φ = 287996.

The previous prime is 431993. The next prime is 432001. The reversal of 431997 is 799134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (431993) and next prime (432001).

It is a cyclic number.

It is not a de Polignac number, because 431997 - 2² = 431993 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71997 + ... + 72002.

It is an arithmetic number, because the mean of its divisors is an integer number (144000).

2⁴³¹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

431997 is a deficient number, since it is larger than the sum of its proper divisors (144003).

431997 is a wasteful number, since it uses less digits than its factorization.

431997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144002.

The product of its digits is 6804, while the sum is 33.

The square root of 431997 is about 657.2647868249. The cubic root of 431997 is about 75.5950880043.

The spelling of 431997 in words is "four hundred thirty-one thousand, nine hundred ninety-seven".