2168677897 has 2 divisors, whose sum is σ = 2168677898. Its totient is φ = 2168677896.

The previous prime is 2168677877. The next prime is 2168677969. The reversal of 2168677897 is 7987768612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1906108281 + 262569616 = 43659^2 + 16204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2168677897 is a prime.

It is not a weakly prime, because it can be changed into another prime (2168677837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084338948 + 1084338949.

It is an arithmetic number, because the mean of its divisors is an integer number (1084338949).

Almost surely, 2^2168677897 is an apocalyptic number.

It is an amenable number.

2168677897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168677897 is an equidigital number, since it uses as much as digits as its factorization.

2168677897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14224896, while the sum is 61.

The square root of 2168677897 is about 46569.0658806895. The cubic root of 2168677897 is about 1294.3896085355.

The spelling of 2168677897 in words is "two billion, one hundred sixty-eight million, six hundred seventy-seven thousand, eight hundred ninety-seven".