1968493 has 4 divisors (see below), whose sum is σ = 1971388. Its totient is φ = 1965600.

The previous prime is 1968487. The next prime is 1968521. The reversal of 1968493 is 3948691.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3948691 = 653 ⋅6047.

It can be written as a sum of positive squares in 2 ways, for example, as 1225449 + 743044 = 1107^2 + 862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1968493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193 + ... + 1993.

It is an arithmetic number, because the mean of its divisors is an integer number (492847).

2^1968493 is an apocalyptic number.

It is an amenable number.

1968493 is a deficient number, since it is larger than the sum of its proper divisors (2895).

1968493 is a wasteful number, since it uses less digits than its factorization.

1968493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894.

The product of its digits is 46656, while the sum is 40.

The square root of 1968493 is about 1403.0299355324. The cubic root of 1968493 is about 125.3269945175.

The spelling of 1968493 in words is "one million, nine hundred sixty-eight thousand, four hundred ninety-three".