196389121 has 4 divisors (see below), whose sum is σ = 196869700. Its totient is φ = 195908544.

The previous prime is 196389113. The next prime is 196389133. The reversal of 196389121 is 121983691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126900225 + 69488896 = 11265^2 + 8336^2 .

It is a cyclic number.

It is not a de Polignac number, because 196389121 - 2³ = 196389113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196389101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239676 + ... + 240493.

It is an arithmetic number, because the mean of its divisors is an integer number (49217425).

Almost surely, 2^196389121 is an apocalyptic number.

It is an amenable number.

196389121 is a deficient number, since it is larger than the sum of its proper divisors (480579).

196389121 is an equidigital number, since it uses as much as digits as its factorization.

196389121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480578.

The product of its digits is 23328, while the sum is 40.

The square root of 196389121 is about 14013.8902878537. The cubic root of 196389121 is about 581.2627274972.

The spelling of 196389121 in words is "one hundred ninety-six million, three hundred eighty-nine thousand, one hundred twenty-one".