2117748349 has 2 divisors, whose sum is σ = 2117748350. Its totient is φ = 2117748348.

The previous prime is 2117748343. The next prime is 2117748389. The reversal of 2117748349 is 9438477112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2114344324 + 3404025 = 45982^2 + 1845^2 .

It is a cyclic number.

It is not a de Polignac number, because 2117748349 - 2⁷ = 2117748221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2117748299 and 2117748308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117748343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058874174 + 1058874175.

It is an arithmetic number, because the mean of its divisors is an integer number (1058874175).

Almost surely, 2^2117748349 is an apocalyptic number.

It is an amenable number.

2117748349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117748349 is an equidigital number, since it uses as much as digits as its factorization.

2117748349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The square root of 2117748349 is about 46018.9998696191. Note that the first 3 decimals coincide. The cubic root of 2117748349 is about 1284.1766943764.

The spelling of 2117748349 in words is "two billion, one hundred seventeen million, seven hundred forty-eight thousand, three hundred forty-nine".