1728743941 has 4 divisors (see below), whose sum is σ = 1728969952. Its totient is φ = 1728517932.

The previous prime is 1728743909. The next prime is 1728743971. The reversal of 1728743941 is 1493478271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1493478271 = 17 ⋅87851663.

It is a cyclic number.

It is not a de Polignac number, because 1728743941 - 2⁵ = 1728743909 is a prime.

It is a super-2 number, since 2×1728743941² = 5977111227088422962, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1728743891 and 1728743900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728743971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101115 + ... + 116968.

It is an arithmetic number, because the mean of its divisors is an integer number (432242488).

Almost surely, 2^1728743941 is an apocalyptic number.

It is an amenable number.

1728743941 is a deficient number, since it is larger than the sum of its proper divisors (226011).

1728743941 is an equidigital number, since it uses as much as digits as its factorization.

1728743941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226010.

The product of its digits is 338688, while the sum is 46.

The square root of 1728743941 is about 41578.1666382730. The cubic root of 1728743941 is about 1200.1721838576.

The spelling of 1728743941 in words is "one billion, seven hundred twenty-eight million, seven hundred forty-three thousand, nine hundred forty-one".