19799143 has 8 divisors (see below), whose sum is σ = 24368288. Its totient is φ = 15665184.

The previous prime is 19799137. The next prime is 19799149. The reversal of 19799143 is 34199791.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19799137) and next prime (19799149).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19799143 - 2⁹ = 19798631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19799143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19799149) 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 7 ways as a sum of consecutive naturals, for example, 108696 + ... + 108877.

It is an arithmetic number, because the mean of its divisors is an integer number (3046036).

Almost surely, 2^19799143 is an apocalyptic number.

19799143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19799143 is a deficient number, since it is larger than the sum of its proper divisors (4569145).

19799143 is a wasteful number, since it uses less digits than its factorization.

19799143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217593.

The product of its digits is 61236, while the sum is 43.

The square root of 19799143 is about 4449.6227930017. The cubic root of 19799143 is about 270.5300196854.

The spelling of 19799143 in words is "nineteen million, seven hundred ninety-nine thousand, one hundred forty-three".