2179906 has 8 divisors (see below), whose sum is σ = 3277260. Its totient is φ = 1087488.

The previous prime is 2179897. The next prime is 2179909. The reversal of 2179906 is 6099712.

It can be written as a sum of positive squares in 2 ways, for example, as 1934881 + 245025 = 1391^2 + 495^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2179909) 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 in 3 ways as a sum of consecutive naturals, for example, 210 + ... + 2098.

2^2179906 is an apocalyptic number.

2179906 is a deficient number, since it is larger than the sum of its proper divisors (1097354).

2179906 is a wasteful number, since it uses less digits than its factorization.

2179906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 2179906 is about 1476.4504732635. The cubic root of 2179906 is about 129.6619620010.

The spelling of 2179906 in words is "two million, one hundred seventy-nine thousand, nine hundred six".