617859489347 has 2 divisors, whose sum is σ = 617859489348. Its totient is φ = 617859489346.

The previous prime is 617859489337. The next prime is 617859489397. The reversal of 617859489347 is 743984958716.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617859489347 is a prime.

It is a super-2 number, since 2×617859489347² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (617859489337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308929744673 + 308929744674.

It is an arithmetic number, because the mean of its divisors is an integer number (308929744674).

Almost surely, 2^617859489347 is an apocalyptic number.

617859489347 is a deficient number, since it is larger than the sum of its proper divisors (1).

617859489347 is an equidigital number, since it uses as much as digits as its factorization.

617859489347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 365783040, while the sum is 71.

The spelling of 617859489347 in words is "six hundred seventeen billion, eight hundred fifty-nine million, four hundred eighty-nine thousand, three hundred forty-seven".