51968717 has 2 divisors, whose sum is σ = 51968718. Its totient is φ = 51968716.

The previous prime is 51968713. The next prime is 51968731. The reversal of 51968717 is 71786915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51566761 + 401956 = 7181^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 51968717 - 2² = 51968713 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 (51968713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25984358 + 25984359.

It is an arithmetic number, because the mean of its divisors is an integer number (25984359).

Almost surely, 2^51968717 is an apocalyptic number.

It is an amenable number.

51968717 is a deficient number, since it is larger than the sum of its proper divisors (1).

51968717 is an equidigital number, since it uses as much as digits as its factorization.

51968717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 44.

The square root of 51968717 is about 7208.9331388216. The cubic root of 51968717 is about 373.1762518552.

The spelling of 51968717 in words is "fifty-one million, nine hundred sixty-eight thousand, seven hundred seventeen".