2179209123 has 64 divisors (see below), whose sum is σ = 4182707200. Its totient is φ = 1088951040.

The previous prime is 2179209119. The next prime is 2179209143. The reversal of 2179209123 is 3219029712.

It is a Cunningham number, because it is equal to 46682²-1.

It is not a de Polignac number, because 2179209123 - 2² = 2179209119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2179209143) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23343 + ... + 70023.

It is an arithmetic number, because the mean of its divisors is an integer number (65354800).

Almost surely, 2^2179209123 is an apocalyptic number.

2179209123 is a deficient number, since it is larger than the sum of its proper divisors (2003498077).

2179209123 is a wasteful number, since it uses less digits than its factorization.

2179209123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46729 (or 46723 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 2179209123 is about 46681.9999892892. Note that the first 4 decimals coincide. The cubic root of 2179209123 is about 1296.4814365750.

The spelling of 2179209123 in words is "two billion, one hundred seventy-nine million, two hundred nine thousand, one hundred twenty-three".