617712340397 has 2 divisors, whose sum is σ = 617712340398. Its totient is φ = 617712340396.

The previous prime is 617712340369. The next prime is 617712340507. The reversal of 617712340397 is 793043217716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 603214735561 + 14497604836 = 776669^2 + 120406^2 .

It is a cyclic number.

It is not a de Polignac number, because 617712340397 - 2³⁴ = 600532471213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617712340307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308856170198 + 308856170199.

It is an arithmetic number, because the mean of its divisors is an integer number (308856170199).

Almost surely, 2^617712340397 is an apocalyptic number.

It is an amenable number.

617712340397 is a deficient number, since it is larger than the sum of its proper divisors (1).

617712340397 is an equidigital number, since it uses as much as digits as its factorization.

617712340397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1333584, while the sum is 50.

The spelling of 617712340397 in words is "six hundred seventeen billion, seven hundred twelve million, three hundred forty thousand, three hundred ninety-seven".