611839 has 2 divisors, whose sum is σ = 611840. Its totient is φ = 611838.

The previous prime is 611837. The next prime is 611873. The reversal of 611839 is 938116.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 611839 - 2¹ = 611837 is a prime.

Together with 611837, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305919 + 305920.

It is an arithmetic number, because the mean of its divisors is an integer number (305920).

2⁶¹¹⁸³⁹ is an apocalyptic number.

611839 is a deficient number, since it is larger than the sum of its proper divisors (1).

611839 is an equidigital number, since it uses as much as digits as its factorization.

611839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 611839 is about 782.2013807198. The cubic root of 611839 is about 84.8944017381.

The spelling of 611839 in words is "six hundred eleven thousand, eight hundred thirty-nine".