2185697 has 2 divisors, whose sum is σ = 2185698. Its totient is φ = 2185696.

The previous prime is 2185661. The next prime is 2185699. The reversal of 2185697 is 7965812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1661521 + 524176 = 1289^2 + 724^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185697 - 2¹⁰ = 2184673 is a prime.

Together with 2185699, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2185697.

It is not a weakly prime, because it can be changed into another prime (2185699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092848 + 1092849.

It is an arithmetic number, because the mean of its divisors is an integer number (1092849).

2^2185697 is an apocalyptic number.

It is an amenable number.

2185697 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185697 is an equidigital number, since it uses as much as digits as its factorization.

2185697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 2185697 is about 1478.4102948776. The cubic root of 2185697 is about 129.7766777264.

It can be divided in two parts, 2185 and 697, that added together give a palindrome (2882).

The spelling of 2185697 in words is "two million, one hundred eighty-five thousand, six hundred ninety-seven".