65989841 has 4 divisors (see below), whose sum is σ = 66974832. Its totient is φ = 65004852.

The previous prime is 65989837. The next prime is 65989843. The reversal of 65989841 is 14898956.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 65989841 - 2² = 65989837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65989841.

It is not an unprimeable number, because it can be changed into a prime (65989843) 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, 492395 + ... + 492528.

It is an arithmetic number, because the mean of its divisors is an integer number (16743708).

Almost surely, 2^65989841 is an apocalyptic number.

It is an amenable number.

65989841 is a deficient number, since it is larger than the sum of its proper divisors (984991).

65989841 is an equidigital number, since it uses as much as digits as its factorization.

65989841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984990.

The product of its digits is 622080, while the sum is 50.

The square root of 65989841 is about 8123.4131373457. The cubic root of 65989841 is about 404.1032661713.

The spelling of 65989841 in words is "sixty-five million, nine hundred eighty-nine thousand, eight hundred forty-one".