65443001 has 4 divisors (see below), whose sum is σ = 70477092. Its totient is φ = 60408912.

The previous prime is 65442997. The next prime is 65443031. The reversal of 65443001 is 10034456.

65443001 = 1574² + 1575² + ... + 1599².

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2637376 + 62805625 = 1624^2 + 7925^2 .

It is a cyclic number.

It is not a de Polignac number, because 65443001 - 2² = 65442997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65443031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2517026 + ... + 2517051.

It is an arithmetic number, because the mean of its divisors is an integer number (17619273).

Almost surely, 2^65443001 is an apocalyptic number.

It is an amenable number.

65443001 is a deficient number, since it is larger than the sum of its proper divisors (5034091).

65443001 is a wasteful number, since it uses less digits than its factorization.

65443001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5034090.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 65443001 is about 8089.6848517109. The cubic root of 65443001 is about 402.9839370315.

Adding to 65443001 its reverse (10034456), we get a palindrome (75477457).

The spelling of 65443001 in words is "sixty-five million, four hundred forty-three thousand, one".