65939953 has 2 divisors, whose sum is σ = 65939954. Its totient is φ = 65939952.

The previous prime is 65939911. The next prime is 65939981. The reversal of 65939953 is 35993956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64112049 + 1827904 = 8007^2 + 1352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65939953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65939897 and 65939906.

It is not a weakly prime, because it can be changed into another prime (65939903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32969976 + 32969977.

It is an arithmetic number, because the mean of its divisors is an integer number (32969977).

Almost surely, 2^65939953 is an apocalyptic number.

It is an amenable number.

65939953 is a deficient number, since it is larger than the sum of its proper divisors (1).

65939953 is an equidigital number, since it uses as much as digits as its factorization.

65939953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 984150, while the sum is 49.

The square root of 65939953 is about 8120.3419262984. The cubic root of 65939953 is about 404.0014071284.

The spelling of 65939953 in words is "sixty-five million, nine hundred thirty-nine thousand, nine hundred fifty-three".