2117238427 has 2 divisors, whose sum is σ = 2117238428. Its totient is φ = 2117238426.

The previous prime is 2117238407. The next prime is 2117238437. The reversal of 2117238427 is 7248327112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2117238427 is a prime.

It is not a weakly prime, because it can be changed into another prime (2117238407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058619213 + 1058619214.

It is an arithmetic number, because the mean of its divisors is an integer number (1058619214).

Almost surely, 2^2117238427 is an apocalyptic number.

2117238427 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117238427 is an equidigital number, since it uses as much as digits as its factorization.

2117238427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 37.

The square root of 2117238427 is about 46013.4591940228. The cubic root of 2117238427 is about 1284.0736159483.

The spelling of 2117238427 in words is "two billion, one hundred seventeen million, two hundred thirty-eight thousand, four hundred twenty-seven".