2117640047 has 2 divisors, whose sum is σ = 2117640048. Its totient is φ = 2117640046.

The previous prime is 2117640029. The next prime is 2117640053. The reversal of 2117640047 is 7400467112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2117640047 - 2²⁰ = 2116591471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2117639995 and 2117640022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117640067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058820023 + 1058820024.

It is an arithmetic number, because the mean of its divisors is an integer number (1058820024).

Almost surely, 2^2117640047 is an apocalyptic number.

2117640047 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117640047 is an equidigital number, since it uses as much as digits as its factorization.

2117640047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 2117640047 is about 46017.8231449511. The cubic root of 2117640047 is about 1284.1548030006.

The spelling of 2117640047 in words is "two billion, one hundred seventeen million, six hundred forty thousand, forty-seven".