65728913 has 2 divisors, whose sum is σ = 65728914. Its totient is φ = 65728912.

The previous prime is 65728907. The next prime is 65728931. The reversal of 65728913 is 31982756.

Together with next prime (65728931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36385024 + 29343889 = 6032^2 + 5417^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65728913 is a prime.

It is not a weakly prime, because it can be changed into another prime (65728933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32864456 + 32864457.

It is an arithmetic number, because the mean of its divisors is an integer number (32864457).

Almost surely, 2^65728913 is an apocalyptic number.

It is an amenable number.

65728913 is a deficient number, since it is larger than the sum of its proper divisors (1).

65728913 is an equidigital number, since it uses as much as digits as its factorization.

65728913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 65728913 is about 8107.3369857186. The cubic root of 65728913 is about 403.5699460111.

The spelling of 65728913 in words is "sixty-five million, seven hundred twenty-eight thousand, nine hundred thirteen".