431801 has 2 divisors, whose sum is σ = 431802. Its totient is φ = 431800.

The previous prime is 431797. The next prime is 431803. The reversal of 431801 is 108134.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409600 + 22201 = 640^2 + 149^2 .

It is a cyclic number.

It is not a de Polignac number, because 431801 - 2² = 431797 is a prime.

Together with 431803, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 431801.

It is not a weakly prime, because it can be changed into another prime (431803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215900 + 215901.

It is an arithmetic number, because the mean of its divisors is an integer number (215901).

2⁴³¹⁸⁰¹ is an apocalyptic number.

It is an amenable number.

431801 is a deficient number, since it is larger than the sum of its proper divisors (1).

431801 is an equidigital number, since it uses as much as digits as its factorization.

431801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 431801 is about 657.1156671394. The cubic root of 431801 is about 75.5836536049.

Adding to 431801 its reverse (108134), we get a palindrome (539935).

The spelling of 431801 in words is "four hundred thirty-one thousand, eight hundred one".