65287291 has 2 divisors, whose sum is σ = 65287292. Its totient is φ = 65287290.

The previous prime is 65287289. The next prime is 65287301. The reversal of 65287291 is 19278256.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65287291 - 2¹ = 65287289 is a prime.

It is a super-2 number, since 2×65287291² = 8524860732237362, which contains 22 as substring.

Together with 65287289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65287241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32643645 + 32643646.

It is an arithmetic number, because the mean of its divisors is an integer number (32643646).

Almost surely, 2^65287291 is an apocalyptic number.

65287291 is a deficient number, since it is larger than the sum of its proper divisors (1).

65287291 is an equidigital number, since it uses as much as digits as its factorization.

65287291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 65287291 is about 8080.0551359505. The cubic root of 65287291 is about 402.6640736381.

The spelling of 65287291 in words is "sixty-five million, two hundred eighty-seven thousand, two hundred ninety-one".