1728148031 has 2 divisors, whose sum is σ = 1728148032. Its totient is φ = 1728148030.

The previous prime is 1728148013. The next prime is 1728148043. The reversal of 1728148031 is 1308418271.

Together with previous prime (1728148013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1728148031 - 2²² = 1723953727 is a prime.

It is a super-2 number, since 2×1728148031² = 5972991234098353922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1728147982 and 1728148000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1728148001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864074015 + 864074016.

It is an arithmetic number, because the mean of its divisors is an integer number (864074016).

Almost surely, 2^1728148031 is an apocalyptic number.

1728148031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728148031 is an equidigital number, since it uses as much as digits as its factorization.

1728148031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 1728148031 is about 41570.9998797238. Note that the first 3 decimals coincide. The cubic root of 1728148031 is about 1200.0342654567.

The spelling of 1728148031 in words is "one billion, seven hundred twenty-eight million, one hundred forty-eight thousand, thirty-one".