2106197 has 2 divisors, whose sum is σ = 2106198. Its totient is φ = 2106196.

The previous prime is 2106191. The next prime is 2106199. The reversal of 2106197 is 7916012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1957201 + 148996 = 1399^2 + 386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2106197 is a prime.

Together with 2106199, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₁₅₆₂₃₉ and since 2106197 and 156239 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2106191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053098 + 1053099.

It is an arithmetic number, because the mean of its divisors is an integer number (1053099).

2^2106197 is an apocalyptic number.

It is an amenable number.

2106197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106197 is an equidigital number, since it uses as much as digits as its factorization.

2106197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 2106197 is about 1451.2742676696. The cubic root of 2106197 is about 128.1837570678.

The spelling of 2106197 in words is "two million, one hundred six thousand, one hundred ninety-seven".