2117646247 has 2 divisors, whose sum is σ = 2117646248. Its totient is φ = 2117646246.

The previous prime is 2117646233. The next prime is 2117646253. The reversal of 2117646247 is 7426467112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2117646247 - 2²⁷ = 1983428519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117646227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058823123 + 1058823124.

It is an arithmetic number, because the mean of its divisors is an integer number (1058823124).

Almost surely, 2^2117646247 is an apocalyptic number.

2117646247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117646247 is an equidigital number, since it uses as much as digits as its factorization.

2117646247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 40.

The square root of 2117646247 is about 46017.8905101049. The cubic root of 2117646247 is about 1284.1560562435.

The spelling of 2117646247 in words is "two billion, one hundred seventeen million, six hundred forty-six thousand, two hundred forty-seven".