2116892509 has 2 divisors, whose sum is σ = 2116892510. Its totient is φ = 2116892508.

The previous prime is 2116892441. The next prime is 2116892521. The reversal of 2116892509 is 9052986112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1985148025 + 131744484 = 44555^2 + 11478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2116892509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2116892579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058446254 + 1058446255.

It is an arithmetic number, because the mean of its divisors is an integer number (1058446255).

Almost surely, 2^2116892509 is an apocalyptic number.

It is an amenable number.

2116892509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2116892509 is an equidigital number, since it uses as much as digits as its factorization.

2116892509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 2116892509 is about 46009.7001620310. The cubic root of 2116892509 is about 1284.0036807654.

The spelling of 2116892509 in words is "two billion, one hundred sixteen million, eight hundred ninety-two thousand, five hundred nine".