2118701797 has 2 divisors, whose sum is σ = 2118701798. Its totient is φ = 2118701796.

The previous prime is 2118701771. The next prime is 2118701821. The reversal of 2118701797 is 7971078112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1350636001 + 768065796 = 36751^2 + 27714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2118701797 is a prime.

It is a super-2 number, since 2×2118701797² = 8977794609222058418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118701737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059350898 + 1059350899.

It is an arithmetic number, because the mean of its divisors is an integer number (1059350899).

Almost surely, 2^2118701797 is an apocalyptic number.

It is an amenable number.

2118701797 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118701797 is an equidigital number, since it uses as much as digits as its factorization.

2118701797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 43.

The square root of 2118701797 is about 46029.3579903088. The cubic root of 2118701797 is about 1284.3693851966.

The spelling of 2118701797 in words is "two billion, one hundred eighteen million, seven hundred one thousand, seven hundred ninety-seven".