2116397 has 2 divisors, whose sum is σ = 2116398. Its totient is φ = 2116396.

The previous prime is 2116393. The next prime is 2116403. The reversal of 2116397 is 7936112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1485961 + 630436 = 1219^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116397 - 2² = 2116393 is a prime.

It is a Chen prime.

It is an Ulam number.

It is equal to p₁₅₆₉₃₅ and since 2116397 and 156935 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 (2116393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058198 + 1058199.

It is an arithmetic number, because the mean of its divisors is an integer number (1058199).

2^2116397 is an apocalyptic number.

It is an amenable number.

2116397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2116397 is an equidigital number, since it uses as much as digits as its factorization.

2116397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 29.

The square root of 2116397 is about 1454.7841764331. The cubic root of 2116397 is about 128.3903489089.

The spelling of 2116397 in words is "two million, one hundred sixteen thousand, three hundred ninety-seven".