1720431683 has 2 divisors, whose sum is σ = 1720431684. Its totient is φ = 1720431682.

The previous prime is 1720431653. The next prime is 1720431737. The reversal of 1720431683 is 3861340271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1720431683 - 2⁶ = 1720431619 is a prime.

It is not a weakly prime, because it can be changed into another prime (1720431613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860215841 + 860215842.

It is an arithmetic number, because the mean of its divisors is an integer number (860215842).

Almost surely, 2^1720431683 is an apocalyptic number.

1720431683 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720431683 is an equidigital number, since it uses as much as digits as its factorization.

1720431683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 1720431683 is about 41478.0867808533. The cubic root of 1720431683 is about 1198.2455108251.

The spelling of 1720431683 in words is "one billion, seven hundred twenty million, four hundred thirty-one thousand, six hundred eighty-three".