2166903 has 12 divisors (see below), whose sum is σ = 3182088. Its totient is φ = 1420560.

The previous prime is 2166877. The next prime is 2166917. The reversal of 2166903 is 3096612.

It is a happy number.

It is not a de Polignac number, because 2166903 - 2¹² = 2162807 is a prime.

It is a super-2 number, since 2×2166903² = 9390937222818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1425 + ... + 2522.

It is an arithmetic number, because the mean of its divisors is an integer number (265174).

2^2166903 is an apocalyptic number.

2166903 is a deficient number, since it is larger than the sum of its proper divisors (1015185).

2166903 is a wasteful number, since it uses less digits than its factorization.

2166903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4014 (or 4011 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2166903 is about 1472.0404206407. The cubic root of 2166903 is about 129.4036392524.

The spelling of 2166903 in words is "two million, one hundred sixty-six thousand, nine hundred three".