2118239 has 2 divisors, whose sum is σ = 2118240. Its totient is φ = 2118238.

The previous prime is 2118209. The next prime is 2118269. The reversal of 2118239 is 9328112.

It is a balanced prime because it is at equal distance from previous prime (2118209) and next prime (2118269).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2118239 is a prime.

It is a super-2 number, since 2×2118239² = 8973872922242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059119 + 1059120.

It is an arithmetic number, because the mean of its divisors is an integer number (1059120).

2^2118239 is an apocalyptic number.

2118239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118239 is an equidigital number, since it uses as much as digits as its factorization.

2118239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 2118239 is about 1455.4171223398. The cubic root of 2118239 is about 128.4275861640.

The spelling of 2118239 in words is "two million, one hundred eighteen thousand, two hundred thirty-nine".