431869 has 2 divisors, whose sum is σ = 431870. Its totient is φ = 431868.

The previous prime is 431867. The next prime is 431881. The reversal of 431869 is 968134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 34969 = 630^2 + 187^2 .

It is a cyclic number.

It is not a de Polignac number, because 431869 - 2¹ = 431867 is a prime.

It is a super-2 number, since 2×431869² = 373021666322, which contains 22 as substring.

Together with 431867, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 431869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431863) 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 as a sum of consecutive naturals, namely, 215934 + 215935.

It is an arithmetic number, because the mean of its divisors is an integer number (215935).

2⁴³¹⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

431869 is a deficient number, since it is larger than the sum of its proper divisors (1).

431869 is an equidigital number, since it uses as much as digits as its factorization.

431869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 431869 is about 657.1674063737. The cubic root of 431869 is about 75.5876210333.

The spelling of 431869 in words is "four hundred thirty-one thousand, eight hundred sixty-nine".