1431941309 has 2 divisors, whose sum is σ = 1431941310. Its totient is φ = 1431941308.

The previous prime is 1431941249. The next prime is 1431941317. The reversal of 1431941309 is 9031491341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1279492900 + 152448409 = 35770^2 + 12347^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431941309 - 2⁸ = 1431941053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1431941369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715970654 + 715970655.

It is an arithmetic number, because the mean of its divisors is an integer number (715970655).

Almost surely, 2^1431941309 is an apocalyptic number.

It is an amenable number.

1431941309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431941309 is an equidigital number, since it uses as much as digits as its factorization.

1431941309 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 35.

The square root of 1431941309 is about 37841.0003699691. Note that the first 3 decimals coincide. The cubic root of 1431941309 is about 1127.1327598501.

The spelling of 1431941309 in words is "one billion, four hundred thirty-one million, nine hundred forty-one thousand, three hundred nine".