2100605197 has 2 divisors, whose sum is σ = 2100605198. Its totient is φ = 2100605196.

The previous prime is 2100605191. The next prime is 2100605201. The reversal of 2100605197 is 7915060012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1896515401 + 204089796 = 43549^2 + 14286^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100605197 - 2¹¹ = 2100603149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100605191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050302598 + 1050302599.

It is an arithmetic number, because the mean of its divisors is an integer number (1050302599).

Almost surely, 2^2100605197 is an apocalyptic number.

It is an amenable number.

2100605197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100605197 is an equidigital number, since it uses as much as digits as its factorization.

2100605197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 2100605197 is about 45832.3597145074. The cubic root of 2100605197 is about 1280.7021694687.

The spelling of 2100605197 in words is "two billion, one hundred million, six hundred five thousand, one hundred ninety-seven".