2179040009197 has 2 divisors, whose sum is σ = 2179040009198. Its totient is φ = 2179040009196.

The previous prime is 2179040009171. The next prime is 2179040009203. The reversal of 2179040009197 is 7919000409712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1414515363556 + 764524645641 = 1189334^2 + 874371^2 .

It is a cyclic number.

It is not a de Polignac number, because 2179040009197 - 2¹¹ = 2179040007149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2179040009197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2179040009297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089520004598 + 1089520004599.

It is an arithmetic number, because the mean of its divisors is an integer number (1089520004599).

Almost surely, 2^{2179040009197} is an apocalyptic number.

It is an amenable number.

2179040009197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2179040009197 is an equidigital number, since it uses as much as digits as its factorization.

2179040009197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 49.

The spelling of 2179040009197 in words is "two trillion, one hundred seventy-nine billion, forty million, nine thousand, one hundred ninety-seven".