2197118797 has 2 divisors, whose sum is σ = 2197118798. Its totient is φ = 2197118796.

The previous prime is 2197118767. The next prime is 2197118809. The reversal of 2197118797 is 7978117912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1209022441 + 988096356 = 34771^2 + 31434^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197118797 - 2¹⁹ = 2196594509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2197118767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098559398 + 1098559399.

It is an arithmetic number, because the mean of its divisors is an integer number (1098559399).

Almost surely, 2^2197118797 is an apocalyptic number.

It is an amenable number.

2197118797 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197118797 is an equidigital number, since it uses as much as digits as its factorization.

2197118797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 52.

The square root of 2197118797 is about 46873.4338085018. The cubic root of 2197118797 is about 1300.0234309386.

The spelling of 2197118797 in words is "two billion, one hundred ninety-seven million, one hundred eighteen thousand, seven hundred ninety-seven".