19943379 has 6 divisors (see below), whose sum is σ = 28807116. Its totient is φ = 13295580.

The previous prime is 19943353. The next prime is 19943383. The reversal of 19943379 is 97334991.

It is not a de Polignac number, because 19943379 - 2⁵ = 19943347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19943389) 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 5 ways as a sum of consecutive naturals, for example, 1107957 + ... + 1107974.

It is an arithmetic number, because the mean of its divisors is an integer number (4801186).

Almost surely, 2^19943379 is an apocalyptic number.

19943379 is a deficient number, since it is larger than the sum of its proper divisors (8863737).

19943379 is a wasteful number, since it uses less digits than its factorization.

19943379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215937 (or 2215934 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 19943379 is about 4465.8010479644. The cubic root of 19943379 is about 271.1853644829.

The spelling of 19943379 in words is "nineteen million, nine hundred forty-three thousand, three hundred seventy-nine".