197982101 has 4 divisors (see below), whose sum is σ = 204809100. Its totient is φ = 191155104.

The previous prime is 197982073. The next prime is 197982107. The reversal of 197982101 is 101289791.

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

It can be written as a sum of positive squares in 2 ways, for example, as 145781476 + 52200625 = 12074^2 + 7225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197982101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197982107) 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, 3413456 + ... + 3413513.

It is an arithmetic number, because the mean of its divisors is an integer number (51202275).

Almost surely, 2^197982101 is an apocalyptic number.

It is an amenable number.

197982101 is a deficient number, since it is larger than the sum of its proper divisors (6826999).

197982101 is an equidigital number, since it uses as much as digits as its factorization.

197982101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6826998.

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 197982101 is about 14070.6112518256. The cubic root of 197982101 is about 582.8301048491.

The spelling of 197982101 in words is "one hundred ninety-seven million, nine hundred eighty-two thousand, one hundred one".