2179139 has 2 divisors, whose sum is σ = 2179140. Its totient is φ = 2179138.

The previous prime is 2179097. The next prime is 2179141. The reversal of 2179139 is 9319712.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2179139 - 2¹⁶ = 2113603 is a prime.

It is a Sophie Germain prime.

Together with 2179141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2179039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089569 + 1089570.

It is an arithmetic number, because the mean of its divisors is an integer number (1089570).

2^2179139 is an apocalyptic number.

2179139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2179139 is an equidigital number, since it uses as much as digits as its factorization.

2179139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 32.

The square root of 2179139 is about 1476.1907058372. The cubic root of 2179139 is about 129.6467530285.

The spelling of 2179139 in words is "two million, one hundred seventy-nine thousand, one hundred thirty-nine".