2685817 has 2 divisors, whose sum is σ = 2685818. Its totient is φ = 2685816.

The previous prime is 2685803. The next prime is 2685827. The reversal of 2685817 is 7185862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2262016 + 423801 = 1504^2 + 651^2 .

It is a cyclic number.

It is not a de Polignac number, because 2685817 - 2⁷ = 2685689 is a prime.

It is a super-3 number, since 3×2685817³ = 58123332937932700539, which contains 333 as substring. Note that it is a super-d number also for d = 2.

2685817 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2685827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342908 + 1342909.

It is an arithmetic number, because the mean of its divisors is an integer number (1342909).

2^2685817 is an apocalyptic number.

It is an amenable number.

2685817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685817 is an equidigital number, since it uses as much as digits as its factorization.

2685817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The square root of 2685817 is about 1638.8462404997. The cubic root of 2685817 is about 139.0034158883.

The spelling of 2685817 in words is "two million, six hundred eighty-five thousand, eight hundred seventeen".