611406709 has 2 divisors, whose sum is σ = 611406710. Its totient is φ = 611406708.

The previous prime is 611406671. The next prime is 611406767. The reversal of 611406709 is 907604116.

611406709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 591559684 + 19847025 = 24322^2 + 4455^2 .

It is a cyclic number.

It is not a de Polignac number, because 611406709 - 2⁹ = 611406197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611406799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305703354 + 305703355.

It is an arithmetic number, because the mean of its divisors is an integer number (305703355).

Almost surely, 2^611406709 is an apocalyptic number.

It is an amenable number.

611406709 is a deficient number, since it is larger than the sum of its proper divisors (1).

611406709 is an equidigital number, since it uses as much as digits as its factorization.

611406709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 611406709 is about 24726.6396625178. The cubic root of 611406709 is about 848.7440315879.

The spelling of 611406709 in words is "six hundred eleven million, four hundred six thousand, seven hundred nine".