1968623 has 4 divisors (see below), whose sum is σ = 1981320. Its totient is φ = 1955928.

The previous prime is 1968613. The next prime is 1968641. The reversal of 1968623 is 3268691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1968623 - 2¹⁰ = 1967599 is a prime.

It is a super-2 number, since 2×1968623² = 7750953032258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968613) 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 in 3 ways as a sum of consecutive naturals, for example, 6113 + ... + 6426.

It is an arithmetic number, because the mean of its divisors is an integer number (495330).

2^1968623 is an apocalyptic number.

1968623 is a deficient number, since it is larger than the sum of its proper divisors (12697).

1968623 is a wasteful number, since it uses less digits than its factorization.

1968623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12696.

The product of its digits is 15552, while the sum is 35.

The square root of 1968623 is about 1403.0762630734. The cubic root of 1968623 is about 125.3297533370.

The spelling of 1968623 in words is "one million, nine hundred sixty-eight thousand, six hundred twenty-three".