65642323 has 4 divisors (see below), whose sum is σ = 65658528. Its totient is φ = 65626120.

The previous prime is 65642303. The next prime is 65642347. The reversal of 65642323 is 32324656.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65642323 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65642303) 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, 4038 + ... + 12148.

It is an arithmetic number, because the mean of its divisors is an integer number (16414632).

Almost surely, 2^65642323 is an apocalyptic number.

65642323 is a deficient number, since it is larger than the sum of its proper divisors (16205).

65642323 is an equidigital number, since it uses as much as digits as its factorization.

65642323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16204.

The product of its digits is 25920, while the sum is 31.

The square root of 65642323 is about 8101.9950012327. The cubic root of 65642323 is about 403.3926497163.

Adding to 65642323 its reverse (32324656), we get a palindrome (97966979).

The spelling of 65642323 in words is "sixty-five million, six hundred forty-two thousand, three hundred twenty-three".