197281643 has 6 divisors (see below), whose sum is σ = 213624684. Its totient is φ = 182105976.

The previous prime is 197281631. The next prime is 197281657. The reversal of 197281643 is 346182791.

It is not a de Polignac number, because 197281643 - 2¹⁴ = 197265259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197281643.

It is not an unprimeable number, because it can be changed into a prime (197286643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 583505 + ... + 583842.

It is an arithmetic number, because the mean of its divisors is an integer number (35604114).

Almost surely, 2^197281643 is an apocalyptic number.

197281643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

197281643 is a deficient number, since it is larger than the sum of its proper divisors (16343041).

197281643 is a wasteful number, since it uses less digits than its factorization.

197281643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167373 (or 1167360 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 197281643 is about 14045.6983806431. The cubic root of 197281643 is about 582.1419442953.

The spelling of 197281643 in words is "one hundred ninety-seven million, two hundred eighty-one thousand, six hundred forty-three".