2172179 has 2 divisors, whose sum is σ = 2172180. Its totient is φ = 2172178.

The previous prime is 2172173. The next prime is 2172197. The reversal of 2172179 is 9712712.

Together with next prime (2172197) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2172179 is a prime.

It is equal to p₁₆₀₇₇₈ and since 2172179 and 160778 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2172173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086089 + 1086090.

It is an arithmetic number, because the mean of its divisors is an integer number (1086090).

2^2172179 is an apocalyptic number.

2172179 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172179 is an equidigital number, since it uses as much as digits as its factorization.

2172179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 29.

The square root of 2172179 is about 1473.8314014839. The cubic root of 2172179 is about 129.5085786121.

The spelling of 2172179 in words is "two million, one hundred seventy-two thousand, one hundred seventy-nine".