2173906 has 16 divisors (see below), whose sum is σ = 3847680. Its totient is φ = 901440.

The previous prime is 2173903. The next prime is 2173907. The reversal of 2173906 is 6093712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2071 + ... + 2938.

It is an arithmetic number, because the mean of its divisors is an integer number (240480).

2^2173906 is an apocalyptic number.

2173906 is a deficient number, since it is larger than the sum of its proper divisors (1673774).

2173906 is a wasteful number, since it uses less digits than its factorization.

2173906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5049.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 2173906 is about 1474.4171729873. The cubic root of 2173906 is about 129.5428916325.

The spelling of 2173906 in words is "two million, one hundred seventy-three thousand, nine hundred six".