2173869 has 12 divisors (see below), whose sum is σ = 3248700. Its totient is φ = 1399104.

The previous prime is 2173819. The next prime is 2173877. The reversal of 2173869 is 9683712.

2173869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 660969 + 1512900 = 813^2 + 1230^2 .

It is not a de Polignac number, because 2173869 - 2⁹ = 2173357 is a prime.

It is a super-2 number, since 2×2173869² = 9451412858322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

2173869 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3904 + ... + 4425.

It is an arithmetic number, because the mean of its divisors is an integer number (270725).

2^2173869 is an apocalyptic number.

2173869 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2173869 is a deficient number, since it is larger than the sum of its proper divisors (1074831).

2173869 is a wasteful number, since it uses less digits than its factorization.

2173869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8364 (or 8361 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2173869 is about 1474.4046256032. The cubic root of 2173869 is about 129.5421566860.

The spelling of 2173869 in words is "two million, one hundred seventy-three thousand, eight hundred sixty-nine".