65399039 has 2 divisors, whose sum is σ = 65399040. Its totient is φ = 65399038.

The previous prime is 65399029. The next prime is 65399071. The reversal of 65399039 is 93099356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65399039 - 2⁸ = 65398783 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65399029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32699519 + 32699520.

It is an arithmetic number, because the mean of its divisors is an integer number (32699520).

Almost surely, 2^65399039 is an apocalyptic number.

65399039 is a deficient number, since it is larger than the sum of its proper divisors (1).

65399039 is an equidigital number, since it uses as much as digits as its factorization.

65399039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196830, while the sum is 44.

The square root of 65399039 is about 8086.9672312926. The cubic root of 65399039 is about 402.8936806353.

The spelling of 65399039 in words is "sixty-five million, three hundred ninety-nine thousand, thirty-nine".