65113921 has 2 divisors, whose sum is σ = 65113922. Its totient is φ = 65113920.

The previous prime is 65113889. The next prime is 65113957. The reversal of 65113921 is 12931156.

65113921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65044225 + 69696 = 8065^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 65113921 - 2⁵ = 65113889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65113921.

It is not a weakly prime, because it can be changed into another prime (65113991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32556960 + 32556961.

It is an arithmetic number, because the mean of its divisors is an integer number (32556961).

Almost surely, 2^65113921 is an apocalyptic number.

It is an amenable number.

65113921 is a deficient number, since it is larger than the sum of its proper divisors (1).

65113921 is an equidigital number, since it uses as much as digits as its factorization.

65113921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 65113921 is about 8069.3197358885. The cubic root of 65113921 is about 402.3073336870.

The spelling of 65113921 in words is "sixty-five million, one hundred thirteen thousand, nine hundred twenty-one".