197684643 has 16 divisors (see below), whose sum is σ = 284109056. Its totient is φ = 121543200.

The previous prime is 197684629. The next prime is 197684681. The reversal of 197684643 is 346486791.

It is not a de Polignac number, because 197684643 - 2⁵ = 197684611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197684592 and 197684601.

It is not an unprimeable number, because it can be changed into a prime (197684693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76218 + ... + 78768.

It is an arithmetic number, because the mean of its divisors is an integer number (17756816).

Almost surely, 2^197684643 is an apocalyptic number.

197684643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

197684643 is a deficient number, since it is larger than the sum of its proper divisors (86424413).

197684643 is a wasteful number, since it uses less digits than its factorization.

197684643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4554.

The product of its digits is 870912, while the sum is 48.

The square root of 197684643 is about 14060.0370909895. The cubic root of 197684643 is about 582.5380677167.

The spelling of 197684643 in words is "one hundred ninety-seven million, six hundred eighty-four thousand, six hundred forty-three".