1731320863 has 2 divisors, whose sum is σ = 1731320864. Its totient is φ = 1731320862.

The previous prime is 1731320809. The next prime is 1731320867. The reversal of 1731320863 is 3680231371.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1731320863 - 2¹⁷ = 1731189791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1731320867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 865660431 + 865660432.

It is an arithmetic number, because the mean of its divisors is an integer number (865660432).

Almost surely, 2^1731320863 is an apocalyptic number.

1731320863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1731320863 is an equidigital number, since it uses as much as digits as its factorization.

1731320863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 1731320863 is about 41609.1439830237. The cubic root of 1731320863 is about 1200.7682263723.

The spelling of 1731320863 in words is "one billion, seven hundred thirty-one million, three hundred twenty thousand, eight hundred sixty-three".