65297279249 has 2 divisors, whose sum is σ = 65297279250. Its totient is φ = 65297279248.

The previous prime is 65297279239. The next prime is 65297279279. The reversal of 65297279249 is 94297279256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49836097600 + 15461181649 = 223240^2 + 124343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65297279249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65297279191 and 65297279200.

It is not a weakly prime, because it can be changed into another prime (65297279239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32648639624 + 32648639625.

It is an arithmetic number, because the mean of its divisors is an integer number (32648639625).

Almost surely, 2^65297279249 is an apocalyptic number.

It is an amenable number.

65297279249 is a deficient number, since it is larger than the sum of its proper divisors (1).

65297279249 is an equidigital number, since it uses as much as digits as its factorization.

65297279249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34292160, while the sum is 62.

The spelling of 65297279249 in words is "sixty-five billion, two hundred ninety-seven million, two hundred seventy-nine thousand, two hundred forty-nine".