605720641 has 2 divisors, whose sum is σ = 605720642. Its totient is φ = 605720640.

The previous prime is 605720603. The next prime is 605720681. The reversal of 605720641 is 146027506.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 519156225 + 86564416 = 22785^2 + 9304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-605720641 is a prime.

It is not a weakly prime, because it can be changed into another prime (605720681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302860320 + 302860321.

It is an arithmetic number, because the mean of its divisors is an integer number (302860321).

Almost surely, 2^605720641 is an apocalyptic number.

It is an amenable number.

605720641 is a deficient number, since it is larger than the sum of its proper divisors (1).

605720641 is an equidigital number, since it uses as much as digits as its factorization.

605720641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 605720641 is about 24611.3925042855. The cubic root of 605720641 is about 846.1047329572.

The spelling of 605720641 in words is "six hundred five million, seven hundred twenty thousand, six hundred forty-one".