2116949 has 2 divisors, whose sum is σ = 2116950. Its totient is φ = 2116948.

The previous prime is 2116921. The next prime is 2116951. The reversal of 2116949 is 9496112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1909924 + 207025 = 1382^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116949 - 2⁸ = 2116693 is a prime.

Together with 2116951, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₁₅₆₉₈₃ and since 2116949 and 156983 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2116969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058474 + 1058475.

It is an arithmetic number, because the mean of its divisors is an integer number (1058475).

2^2116949 is an apocalyptic number.

It is an amenable number.

2116949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2116949 is an equidigital number, since it uses as much as digits as its factorization.

2116949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 2116949 is about 1454.9738829271. The cubic root of 2116949 is about 128.4015102225.

The spelling of 2116949 in words is "two million, one hundred sixteen thousand, nine hundred forty-nine".