197401643 has 8 divisors (see below), whose sum is σ = 198424128. Its totient is φ = 196382664.

The previous prime is 197401619. The next prime is 197401651. The reversal of 197401643 is 346104791.

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 197401643 - 2¹² = 197397547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197401543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306680 + ... + 307322.

It is an arithmetic number, because the mean of its divisors is an integer number (24803016).

Almost surely, 2^197401643 is an apocalyptic number.

197401643 is a deficient number, since it is larger than the sum of its proper divisors (1022485).

197401643 is an equidigital number, since it uses as much as digits as its factorization.

197401643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 197401643 is about 14049.9695017463. The cubic root of 197401643 is about 582.2599530350.

The spelling of 197401643 in words is "one hundred ninety-seven million, four hundred one thousand, six hundred forty-three".