1728694801 has 2 divisors, whose sum is σ = 1728694802. Its totient is φ = 1728694800.

The previous prime is 1728694787. The next prime is 1728694811. The reversal of 1728694801 is 1084968271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1566259776 + 162435025 = 39576^2 + 12745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1728694801 - 2²³ = 1720306193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1728694811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864347400 + 864347401.

It is an arithmetic number, because the mean of its divisors is an integer number (864347401).

Almost surely, 2^1728694801 is an apocalyptic number.

It is an amenable number.

1728694801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728694801 is an equidigital number, since it uses as much as digits as its factorization.

1728694801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 1728694801 is about 41577.5756989269. The cubic root of 1728694801 is about 1200.1608120134.

The spelling of 1728694801 in words is "one billion, seven hundred twenty-eight million, six hundred ninety-four thousand, eight hundred one".