65500399 has 2 divisors, whose sum is σ = 65500400. Its totient is φ = 65500398.

The previous prime is 65500381. The next prime is 65500403. The reversal of 65500399 is 99300556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65500399 - 2¹⁹ = 64976111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65500319) 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, 32750199 + 32750200.

It is an arithmetic number, because the mean of its divisors is an integer number (32750200).

Almost surely, 2^65500399 is an apocalyptic number.

65500399 is a deficient number, since it is larger than the sum of its proper divisors (1).

65500399 is an equidigital number, since it uses as much as digits as its factorization.

65500399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 65500399 is about 8093.2316783841. The cubic root of 65500399 is about 403.1017174543.

The spelling of 65500399 in words is "sixty-five million, five hundred thousand, three hundred ninety-nine".