65321899 has 2 divisors, whose sum is σ = 65321900. Its totient is φ = 65321898.

The previous prime is 65321881. The next prime is 65321903. The reversal of 65321899 is 99812356.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65321899 - 2¹¹ = 65319851 is a prime.

It is not a weakly prime, because it can be changed into another prime (65321849) 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, 32660949 + 32660950.

It is an arithmetic number, because the mean of its divisors is an integer number (32660950).

Almost surely, 2^65321899 is an apocalyptic number.

65321899 is a deficient number, since it is larger than the sum of its proper divisors (1).

65321899 is an equidigital number, since it uses as much as digits as its factorization.

65321899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 65321899 is about 8082.1964217656. The cubic root of 65321899 is about 402.7352101816.

The spelling of 65321899 in words is "sixty-five million, three hundred twenty-one thousand, eight hundred ninety-nine".