2179923 has 4 divisors (see below), whose sum is σ = 2906568. Its totient is φ = 1453280.

The previous prime is 2179921. The next prime is 2179939. The reversal of 2179923 is 3299712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2179923 - 2¹ = 2179921 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2179921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363318 + ... + 363323.

It is an arithmetic number, because the mean of its divisors is an integer number (726642).

2^2179923 is an apocalyptic number.

2179923 is a deficient number, since it is larger than the sum of its proper divisors (726645).

2179923 is an equidigital number, since it uses as much as digits as its factorization.

2179923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726644.

The product of its digits is 6804, while the sum is 33.

The square root of 2179923 is about 1476.4562303028. The cubic root of 2179923 is about 129.6622990564.

The spelling of 2179923 in words is "two million, one hundred seventy-nine thousand, nine hundred twenty-three".