611228791 has 2 divisors, whose sum is σ = 611228792. Its totient is φ = 611228790.

The previous prime is 611228729. The next prime is 611228801. The reversal of 611228791 is 197822116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 611228791 - 2²⁷ = 477011063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 611228791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611223791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305614395 + 305614396.

It is an arithmetic number, because the mean of its divisors is an integer number (305614396).

Almost surely, 2^611228791 is an apocalyptic number.

611228791 is a deficient number, since it is larger than the sum of its proper divisors (1).

611228791 is an equidigital number, since it uses as much as digits as its factorization.

611228791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 37.

The square root of 611228791 is about 24723.0417020236. The cubic root of 611228791 is about 848.6616960556.

The spelling of 611228791 in words is "six hundred eleven million, two hundred twenty-eight thousand, seven hundred ninety-one".