65039999 has 2 divisors, whose sum is σ = 65040000. Its totient is φ = 65039998.

The previous prime is 65039971. The next prime is 65040013. The reversal of 65039999 is 99993056.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65039999 - 2⁸ = 65039743 is a prime.

It is a Chen prime.

65039999 is a modest number, since divided by 9999 gives 6503 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65039939) 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, 32519999 + 32520000.

It is an arithmetic number, because the mean of its divisors is an integer number (32520000).

Almost surely, 2^65039999 is an apocalyptic number.

65039999 is a deficient number, since it is larger than the sum of its proper divisors (1).

65039999 is an equidigital number, since it uses as much as digits as its factorization.

65039999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 590490, while the sum is 50.

The square root of 65039999 is about 8064.7379994641. The cubic root of 65039999 is about 402.1550333112.

The spelling of 65039999 in words is "sixty-five million, thirty-nine thousand, nine hundred ninety-nine".