608128861 has 2 divisors, whose sum is σ = 608128862. Its totient is φ = 608128860.

The previous prime is 608128853. The next prime is 608128883. The reversal of 608128861 is 168821806.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 590781636 + 17347225 = 24306^2 + 4165^2 .

It is a cyclic number.

It is not a de Polignac number, because 608128861 - 2³ = 608128853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (608128841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304064430 + 304064431.

It is an arithmetic number, because the mean of its divisors is an integer number (304064431).

Almost surely, 2^608128861 is an apocalyptic number.

It is an amenable number.

608128861 is a deficient number, since it is larger than the sum of its proper divisors (1).

608128861 is an equidigital number, since it uses as much as digits as its factorization.

608128861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 608128861 is about 24660.2688752576. The cubic root of 608128861 is about 847.2245626740.

The spelling of 608128861 in words is "six hundred eight million, one hundred twenty-eight thousand, eight hundred sixty-one".