431132909 has 2 divisors, whose sum is σ = 431132910. Its totient is φ = 431132908.

The previous prime is 431132887. The next prime is 431132939. The reversal of 431132909 is 909231134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427579684 + 3553225 = 20678^2 + 1885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431132909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431132939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215566454 + 215566455.

It is an arithmetic number, because the mean of its divisors is an integer number (215566455).

Almost surely, 2^431132909 is an apocalyptic number.

It is an amenable number.

431132909 is a deficient number, since it is larger than the sum of its proper divisors (1).

431132909 is an equidigital number, since it uses as much as digits as its factorization.

431132909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 431132909 is about 20763.7402459191. The cubic root of 431132909 is about 755.4465197816.

The spelling of 431132909 in words is "four hundred thirty-one million, one hundred thirty-two thousand, nine hundred nine".