196646647 has 4 divisors (see below), whose sum is σ = 196907176. Its totient is φ = 196386120.

The previous prime is 196646629. The next prime is 196646669. The reversal of 196646647 is 746646691.

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 196646647 - 2⁷ = 196646519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196646647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196646617) 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, 129129 + ... + 130642.

It is an arithmetic number, because the mean of its divisors is an integer number (49226794).

Almost surely, 2^196646647 is an apocalyptic number.

196646647 is a deficient number, since it is larger than the sum of its proper divisors (260529).

196646647 is an equidigital number, since it uses as much as digits as its factorization.

196646647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260528.

The product of its digits is 1306368, while the sum is 49.

The square root of 196646647 is about 14023.0755185872. The cubic root of 196646647 is about 581.5166873943.

The spelling of 196646647 in words is "one hundred ninety-six million, six hundred forty-six thousand, six hundred forty-seven".