196784789 has 8 divisors (see below), whose sum is σ = 202497792. Its totient is φ = 191115360.

The previous prime is 196784779. The next prime is 196784821. The reversal of 196784789 is 987487691.

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 196784789 - 2²⁰ = 195736213 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 (196784779) 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, 1619 + ... + 19904.

It is an arithmetic number, because the mean of its divisors is an integer number (25312224).

Almost surely, 2^196784789 is an apocalyptic number.

It is an amenable number.

196784789 is a deficient number, since it is larger than the sum of its proper divisors (5713003).

196784789 is a wasteful number, since it uses less digits than its factorization.

196784789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21787.

The product of its digits is 6096384, while the sum is 59.

The square root of 196784789 is about 14028.0001782150. Note that the first 3 decimals coincide. The cubic root of 196784789 is about 581.6528251081.

The spelling of 196784789 in words is "one hundred ninety-six million, seven hundred eighty-four thousand, seven hundred eighty-nine".