196879921 has 8 divisors (see below), whose sum is σ = 225559040. Its totient is φ = 168339168.

The previous prime is 196879913. The next prime is 196879933. The reversal of 196879921 is 129978691.

196879921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 196879921 - 2³ = 196879913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196879961) 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, 31521 + ... + 37246.

It is an arithmetic number, because the mean of its divisors is an integer number (28194880).

Almost surely, 2^196879921 is an apocalyptic number.

It is an amenable number.

196879921 is a deficient number, since it is larger than the sum of its proper divisors (28679119).

196879921 is an equidigital number, since it uses as much as digits as its factorization.

196879921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69183.

The product of its digits is 489888, while the sum is 52.

The square root of 196879921 is about 14031.3905583160. The cubic root of 196879921 is about 581.7465398079.

The spelling of 196879921 in words is "one hundred ninety-six million, eight hundred seventy-nine thousand, nine hundred twenty-one".