1720063 has 2 divisors, whose sum is σ = 1720064. Its totient is φ = 1720062.

The previous prime is 1720057. The next prime is 1720109. The reversal of 1720063 is 3600271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1720063 - 2⁵ = 1720031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1720063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1720003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860031 + 860032.

It is an arithmetic number, because the mean of its divisors is an integer number (860032).

2^1720063 is an apocalyptic number.

1720063 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720063 is an equidigital number, since it uses as much as digits as its factorization.

1720063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 1720063 is about 1311.5117231653. The cubic root of 1720063 is about 119.8159911318.

The spelling of 1720063 in words is "one million, seven hundred twenty thousand, sixty-three".