197985101 has 4 divisors (see below), whose sum is σ = 198039900. Its totient is φ = 197930304.

The previous prime is 197985071. The next prime is 197985107. The reversal of 197985101 is 101589791.

197985101 = 9949² + 9950².

197985101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 99002500 + 98982601 = 9950^2 + 9949^2 .

It is a cyclic number.

It is not a de Polignac number, because 197985101 - 2⁶ = 197985037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197985107) 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, 21566 + ... + 29343.

It is an arithmetic number, because the mean of its divisors is an integer number (49509975).

Almost surely, 2^197985101 is an apocalyptic number.

197985101 is the 9950-th centered square number.

It is an amenable number.

197985101 is a deficient number, since it is larger than the sum of its proper divisors (54799).

197985101 is an equidigital number, since it uses as much as digits as its factorization.

197985101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54798.

The product of its (nonzero) digits is 22680, while the sum is 41.

The square root of 197985101 is about 14070.7178565985. The cubic root of 197985101 is about 582.8330486867.

The spelling of 197985101 in words is "one hundred ninety-seven million, nine hundred eighty-five thousand, one hundred one".