196819639 has 8 divisors (see below), whose sum is σ = 202466880. Its totient is φ = 191212800.

The previous prime is 196819633. The next prime is 196819657. The reversal of 196819639 is 936918691.

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 196819639 - 2³ = 196819631 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 (196819631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79 + ... + 19840.

It is an arithmetic number, because the mean of its divisors is an integer number (25308360).

Almost surely, 2^196819639 is an apocalyptic number.

196819639 is a deficient number, since it is larger than the sum of its proper divisors (5647241).

196819639 is a wasteful number, since it uses less digits than its factorization.

196819639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20201.

The product of its digits is 629856, while the sum is 52.

The square root of 196819639 is about 14029.2422817485. The cubic root of 196819639 is about 581.6871594090.

The spelling of 196819639 in words is "one hundred ninety-six million, eight hundred nineteen thousand, six hundred thirty-nine".