617925317 has 2 divisors, whose sum is σ = 617925318. Its totient is φ = 617925316.

The previous prime is 617925313. The next prime is 617925377. The reversal of 617925317 is 713529716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558187876 + 59737441 = 23626^2 + 7729^2 .

It is a cyclic number.

It is not a de Polignac number, because 617925317 - 2² = 617925313 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617925311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308962658 + 308962659.

It is an arithmetic number, because the mean of its divisors is an integer number (308962659).

Almost surely, 2^617925317 is an apocalyptic number.

It is an amenable number.

617925317 is a deficient number, since it is larger than the sum of its proper divisors (1).

617925317 is an equidigital number, since it uses as much as digits as its factorization.

617925317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 41.

The square root of 617925317 is about 24858.1036485087. The cubic root of 617925317 is about 851.7497138739.

The spelling of 617925317 in words is "six hundred seventeen million, nine hundred twenty-five thousand, three hundred seventeen".