19790393 has 8 divisors (see below), whose sum is σ = 22955712. Its totient is φ = 16709616.

The previous prime is 19790387. The next prime is 19790411. The reversal of 19790393 is 39309791.

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

It is not a de Polignac number, because 19790393 - 2⁸ = 19790137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19790393.

It is not an unprimeable number, because it can be changed into a prime (19790333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20630 + ... + 21567.

It is an arithmetic number, because the mean of its divisors is an integer number (2869464).

Almost surely, 2^19790393 is an apocalyptic number.

It is an amenable number.

19790393 is a deficient number, since it is larger than the sum of its proper divisors (3165319).

19790393 is an equidigital number, since it uses as much as digits as its factorization.

19790393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42271.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 19790393 is about 4448.6394549345. The cubic root of 19790393 is about 270.4901612857.

The spelling of 19790393 in words is "nineteen million, seven hundred ninety thousand, three hundred ninety-three".