617982072397 has 2 divisors, whose sum is σ = 617982072398. Its totient is φ = 617982072396.

The previous prime is 617982072359. The next prime is 617982072403. The reversal of 617982072397 is 793270289716.

617982072397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 452732505316 + 165249567081 = 672854^2 + 406509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617982072397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617982072797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308991036198 + 308991036199.

It is an arithmetic number, because the mean of its divisors is an integer number (308991036199).

Almost surely, 2^617982072397 is an apocalyptic number.

It is an amenable number.

617982072397 is a deficient number, since it is larger than the sum of its proper divisors (1).

617982072397 is an equidigital number, since it uses as much as digits as its factorization.

617982072397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16003008, while the sum is 61.

The spelling of 617982072397 in words is "six hundred seventeen billion, nine hundred eighty-two million, seventy-two thousand, three hundred ninety-seven".