1728957473 has 2 divisors, whose sum is σ = 1728957474. Its totient is φ = 1728957472.

The previous prime is 1728957469. The next prime is 1728957487. The reversal of 1728957473 is 3747598271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1144671889 + 584285584 = 33833^2 + 24172^2 .

It is a cyclic number.

It is not a de Polignac number, because 1728957473 - 2² = 1728957469 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1728957773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864478736 + 864478737.

It is an arithmetic number, because the mean of its divisors is an integer number (864478737).

Almost surely, 2^1728957473 is an apocalyptic number.

It is an amenable number.

1728957473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728957473 is an equidigital number, since it uses as much as digits as its factorization.

1728957473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 53.

The square root of 1728957473 is about 41580.7343970738. The cubic root of 1728957473 is about 1200.2215963452.

The spelling of 1728957473 in words is "one billion, seven hundred twenty-eight million, nine hundred fifty-seven thousand, four hundred seventy-three".