1728995663 has 2 divisors, whose sum is σ = 1728995664. Its totient is φ = 1728995662.

The previous prime is 1728995657. The next prime is 1728995677. The reversal of 1728995663 is 3665998271.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1728995663 - 2⁴ = 1728995647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1728995599 and 1728995608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1728995633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864497831 + 864497832.

It is an arithmetic number, because the mean of its divisors is an integer number (864497832).

Almost surely, 2^1728995663 is an apocalyptic number.

1728995663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728995663 is an equidigital number, since it uses as much as digits as its factorization.

1728995663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 56.

The square root of 1728995663 is about 41581.1936216362. The cubic root of 1728995663 is about 1200.2304332939.

The spelling of 1728995663 in words is "one billion, seven hundred twenty-eight million, nine hundred ninety-five thousand, six hundred sixty-three".