431341909 has 2 divisors, whose sum is σ = 431341910. Its totient is φ = 431341908.

The previous prime is 431341903. The next prime is 431341927. The reversal of 431341909 is 909143134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 365650884 + 65691025 = 19122^2 + 8105^2 .

It is a cyclic number.

It is not a de Polignac number, because 431341909 - 2¹³ = 431333717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431341903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215670954 + 215670955.

It is an arithmetic number, because the mean of its divisors is an integer number (215670955).

Almost surely, 2^431341909 is an apocalyptic number.

It is an amenable number.

431341909 is a deficient number, since it is larger than the sum of its proper divisors (1).

431341909 is an equidigital number, since it uses as much as digits as its factorization.

431341909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 431341909 is about 20768.7724480769. The cubic root of 431341909 is about 755.5685724890.

The spelling of 431341909 in words is "four hundred thirty-one million, three hundred forty-one thousand, nine hundred nine".