65791409 has 2 divisors, whose sum is σ = 65791410. Its totient is φ = 65791408.

The previous prime is 65791403. The next prime is 65791441. The reversal of 65791409 is 90419756.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49210225 + 16581184 = 7015^2 + 4072^2 .

It is a cyclic number.

It is not a de Polignac number, because 65791409 - 2¹² = 65787313 is a prime.

It is not a weakly prime, because it can be changed into another prime (65791403) 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, 32895704 + 32895705.

It is an arithmetic number, because the mean of its divisors is an integer number (32895705).

Almost surely, 2^65791409 is an apocalyptic number.

It is an amenable number.

65791409 is a deficient number, since it is larger than the sum of its proper divisors (1).

65791409 is an equidigital number, since it uses as much as digits as its factorization.

65791409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 65791409 is about 8111.1903565383. The cubic root of 65791409 is about 403.6978122056.

The spelling of 65791409 in words is "sixty-five million, seven hundred ninety-one thousand, four hundred nine".