1728893497 has 2 divisors, whose sum is σ = 1728893498. Its totient is φ = 1728893496.

The previous prime is 1728893479. The next prime is 1728893503. The reversal of 1728893497 is 7943988271.

Together with previous prime (1728893479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1485408681 + 243484816 = 38541^2 + 15604^2 .

It is a cyclic number.

It is not a de Polignac number, because 1728893497 - 2¹⁵ = 1728860729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1728893407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864446748 + 864446749.

It is an arithmetic number, because the mean of its divisors is an integer number (864446749).

Almost surely, 2^1728893497 is an apocalyptic number.

It is an amenable number.

1728893497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728893497 is an equidigital number, since it uses as much as digits as its factorization.

1728893497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 58.

The square root of 1728893497 is about 41579.9650913754. The cubic root of 1728893497 is about 1200.2067923713.

The spelling of 1728893497 in words is "one billion, seven hundred twenty-eight million, eight hundred ninety-three thousand, four hundred ninety-seven".