196778147 has 4 divisors (see below), whose sum is σ = 201577656. Its totient is φ = 191978640.

The previous prime is 196778119. The next prime is 196778161. The reversal of 196778147 is 741877691.

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

It is a cyclic number.

It is not a de Polignac number, because 196778147 - 2¹⁶ = 196712611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 196778095 and 196778104.

It is not an unprimeable number, because it can be changed into a prime (196778167) 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, 2399693 + ... + 2399774.

It is an arithmetic number, because the mean of its divisors is an integer number (50394414).

Almost surely, 2^196778147 is an apocalyptic number.

196778147 is a deficient number, since it is larger than the sum of its proper divisors (4799509).

196778147 is an equidigital number, since it uses as much as digits as its factorization.

196778147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4799508.

The product of its digits is 592704, while the sum is 50.

The square root of 196778147 is about 14027.7634354162. The cubic root of 196778147 is about 581.6462809344.

The spelling of 196778147 in words is "one hundred ninety-six million, seven hundred seventy-eight thousand, one hundred forty-seven".