2688869 has 2 divisors, whose sum is σ = 2688870. Its totient is φ = 2688868.

The previous prime is 2688863. The next prime is 2688877. The reversal of 2688869 is 9688862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1809025 + 879844 = 1345^2 + 938^2 .

It is a cyclic number.

It is not a de Polignac number, because 2688869 - 2¹⁶ = 2623333 is a prime.

It is a super-2 number, since 2×2688869² = 14460032998322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2688863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344434 + 1344435.

It is an arithmetic number, because the mean of its divisors is an integer number (1344435).

2^2688869 is an apocalyptic number.

It is an amenable number.

2688869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2688869 is an equidigital number, since it uses as much as digits as its factorization.

2688869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 47.

The square root of 2688869 is about 1639.7771190012. Note that the first 3 decimals coincide. The cubic root of 2688869 is about 139.0560476491.

The spelling of 2688869 in words is "two million, six hundred eighty-eight thousand, eight hundred sixty-nine".