65812091 has 2 divisors, whose sum is σ = 65812092. Its totient is φ = 65812090.

The previous prime is 65812073. The next prime is 65812099. The reversal of 65812091 is 19021856.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65812091 - 2⁶ = 65812027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65812099) 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, 32906045 + 32906046.

It is an arithmetic number, because the mean of its divisors is an integer number (32906046).

Almost surely, 2^65812091 is an apocalyptic number.

65812091 is a deficient number, since it is larger than the sum of its proper divisors (1).

65812091 is an equidigital number, since it uses as much as digits as its factorization.

65812091 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 65812091 is about 8112.4651617126. The cubic root of 65812091 is about 403.7401095386.

The spelling of 65812091 in words is "sixty-five million, eight hundred twelve thousand, ninety-one".