65505247 has 2 divisors, whose sum is σ = 65505248. Its totient is φ = 65505246.

The previous prime is 65505241. The next prime is 65505257. The reversal of 65505247 is 74250556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65505247 - 2⁷ = 65505119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65505241) 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, 32752623 + 32752624.

It is an arithmetic number, because the mean of its divisors is an integer number (32752624).

Almost surely, 2^65505247 is an apocalyptic number.

65505247 is a deficient number, since it is larger than the sum of its proper divisors (1).

65505247 is an equidigital number, since it uses as much as digits as its factorization.

65505247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 65505247 is about 8093.5311823703. The cubic root of 65505247 is about 403.1116623755. Note that the first 3 decimals are identical.

The spelling of 65505247 in words is "sixty-five million, five hundred five thousand, two hundred forty-seven".