2169859 has 2 divisors, whose sum is σ = 2169860. Its totient is φ = 2169858.

The previous prime is 2169841. The next prime is 2169877. The reversal of 2169859 is 9589612.

It is a balanced prime because it is at equal distance from previous prime (2169841) and next prime (2169877).

It is a cyclic number.

It is not a de Polignac number, because 2169859 - 2²¹ = 72707 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2169359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084929 + 1084930.

It is an arithmetic number, because the mean of its divisors is an integer number (1084930).

2^2169859 is an apocalyptic number.

2169859 is a deficient number, since it is larger than the sum of its proper divisors (1).

2169859 is an equidigital number, since it uses as much as digits as its factorization.

2169859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 40.

The square root of 2169859 is about 1473.0441269697. The cubic root of 2169859 is about 129.4624548910.

The spelling of 2169859 in words is "two million, one hundred sixty-nine thousand, eight hundred fifty-nine".