196918089 has 16 divisors (see below), whose sum is σ = 278929728. Its totient is φ = 123144192.

The previous prime is 196918061. The next prime is 196918129. The reversal of 196918089 is 980819691.

It is a happy number.

It is not a de Polignac number, because 196918089 - 2¹⁹ = 196393801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (196918009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9369 + ... + 21945.

It is an arithmetic number, because the mean of its divisors is an integer number (17433108).

Almost surely, 2^196918089 is an apocalyptic number.

It is an amenable number.

196918089 is a deficient number, since it is larger than the sum of its proper divisors (82011639).

196918089 is a wasteful number, since it uses less digits than its factorization.

196918089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12904.

The product of its (nonzero) digits is 279936, while the sum is 51.

The square root of 196918089 is about 14032.7505856835. The cubic root of 196918089 is about 581.7841306858.

The spelling of 196918089 in words is "one hundred ninety-six million, nine hundred eighteen thousand, eighty-nine".