65447897 has 4 divisors (see below), whose sum is σ = 65464080. Its totient is φ = 65431716.

The previous prime is 65447891. The next prime is 65447911. The reversal of 65447897 is 79874456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 65447897 - 2⁴ = 65447881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65447891) 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 in 3 ways as a sum of consecutive naturals, for example, 3854 + ... + 12072.

It is an arithmetic number, because the mean of its divisors is an integer number (16366020).

Almost surely, 2^65447897 is an apocalyptic number.

It is an amenable number.

65447897 is a deficient number, since it is larger than the sum of its proper divisors (16183).

65447897 is an equidigital number, since it uses as much as digits as its factorization.

65447897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16182.

The product of its digits is 1693440, while the sum is 50.

The square root of 65447897 is about 8089.9874536367. The cubic root of 65447897 is about 402.9939862862.

It can be divided in two parts, 6544 and 7897, that added together give a palindrome (14441).

The spelling of 65447897 in words is "sixty-five million, four hundred forty-seven thousand, eight hundred ninety-seven".