610861109 has 2 divisors, whose sum is σ = 610861110. Its totient is φ = 610861108.

The previous prime is 610861103. The next prime is 610861183. The reversal of 610861109 is 901168016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 587917009 + 22944100 = 24247^2 + 4790^2 .

It is a cyclic number.

It is not a de Polignac number, because 610861109 - 2⁸ = 610860853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (610861103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305430554 + 305430555.

It is an arithmetic number, because the mean of its divisors is an integer number (305430555).

Almost surely, 2^610861109 is an apocalyptic number.

It is an amenable number.

610861109 is a deficient number, since it is larger than the sum of its proper divisors (1).

610861109 is an equidigital number, since it uses as much as digits as its factorization.

610861109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 610861109 is about 24715.6045647279. The cubic root of 610861109 is about 848.4914923482.

The spelling of 610861109 in words is "six hundred ten million, eight hundred sixty-one thousand, one hundred nine".