1431244109 has 2 divisors, whose sum is σ = 1431244110. Its totient is φ = 1431244108.

The previous prime is 1431244099. The next prime is 1431244169. The reversal of 1431244109 is 9014421341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1191768484 + 239475625 = 34522^2 + 15475^2 .

It is an emirp because it is prime and its reverse (9014421341) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1431244109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1431244169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715622054 + 715622055.

It is an arithmetic number, because the mean of its divisors is an integer number (715622055).

Almost surely, 2^1431244109 is an apocalyptic number.

It is an amenable number.

1431244109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431244109 is an equidigital number, since it uses as much as digits as its factorization.

1431244109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1431244109 is about 37831.7870183263. The cubic root of 1431244109 is about 1126.9497997132.

The spelling of 1431244109 in words is "one billion, four hundred thirty-one million, two hundred forty-four thousand, one hundred nine".