65108921 has 2 divisors, whose sum is σ = 65108922. Its totient is φ = 65108920.

The previous prime is 65108893. The next prime is 65108941. The reversal of 65108921 is 12980156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46308025 + 18800896 = 6805^2 + 4336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65108921 is a prime.

It is not a weakly prime, because it can be changed into another prime (65108941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32554460 + 32554461.

It is an arithmetic number, because the mean of its divisors is an integer number (32554461).

Almost surely, 2^65108921 is an apocalyptic number.

It is an amenable number.

65108921 is a deficient number, since it is larger than the sum of its proper divisors (1).

65108921 is an equidigital number, since it uses as much as digits as its factorization.

65108921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 65108921 is about 8069.0099144815. The cubic root of 65108921 is about 402.2970358985.

The spelling of 65108921 in words is "sixty-five million, one hundred eight thousand, nine hundred twenty-one".