196021917 has 144 divisors (see below), whose sum is σ = 401604480. Its totient is φ = 92192256.

The previous prime is 196021909. The next prime is 196021919. The reversal of 196021917 is 719120691.

It is not a de Polignac number, because 196021917 - 2³ = 196021909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196021919) 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 143 ways as a sum of consecutive naturals, for example, 10316934 + ... + 10316952.

It is an arithmetic number, because the mean of its divisors is an integer number (2788920).

Almost surely, 2^196021917 is an apocalyptic number.

196021917 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

196021917 is an abundant number, since it is smaller than the sum of its proper divisors (205582563).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

196021917 is a wasteful number, since it uses less digits than its factorization.

196021917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

The square root of 196021917 is about 14000.7827281192. The cubic root of 196021917 is about 580.9002241067.

The spelling of 196021917 in words is "one hundred ninety-six million, twenty-one thousand, nine hundred seventeen".