611791 has 2 divisors, whose sum is σ = 611792. Its totient is φ = 611790.

The previous prime is 611753. The next prime is 611801. The reversal of 611791 is 197116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 611791 - 2⁹ = 611279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612791) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305895 + 305896.

It is an arithmetic number, because the mean of its divisors is an integer number (305896).

2⁶¹¹⁷⁹¹ is an apocalyptic number.

611791 is a deficient number, since it is larger than the sum of its proper divisors (1).

611791 is an equidigital number, since it uses as much as digits as its factorization.

611791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 25.

The square root of 611791 is about 782.1706974823. The cubic root of 611791 is about 84.8921816346.

The spelling of 611791 in words is "six hundred eleven thousand, seven hundred ninety-one".