19968959 has 4 divisors (see below), whose sum is σ = 19984416. Its totient is φ = 19953504.

The previous prime is 19968953. The next prime is 19968973. The reversal of 19968959 is 95986991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95986991 = 37 ⋅2594243.

It is a cyclic number.

It is not a de Polignac number, because 19968959 - 2¹² = 19964863 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 (19968953) 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, 5594 + ... + 8439.

It is an arithmetic number, because the mean of its divisors is an integer number (4996104).

Almost surely, 2^19968959 is an apocalyptic number.

19968959 is a deficient number, since it is larger than the sum of its proper divisors (15457).

19968959 is a wasteful number, since it uses less digits than its factorization.

19968959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15456.

The product of its digits is 1574640, while the sum is 56.

The square root of 19968959 is about 4468.6641180559. The cubic root of 19968959 is about 271.3012585497.

The spelling of 19968959 in words is "nineteen million, nine hundred sixty-eight thousand, nine hundred fifty-nine".