320043001 has 4 divisors (see below), whose sum is σ = 320118372. Its totient is φ = 319967632.

The previous prime is 320042993. The next prime is 320043029. The reversal of 320043001 is 100340023.

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 113976976 + 206066025 = 10676^2 + 14355^2 .

It is a cyclic number.

It is not a de Polignac number, because 320043001 - 2³ = 320042993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320043901) 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, 30910 + ... + 39943.

It is an arithmetic number, because the mean of its divisors is an integer number (80029593).

Almost surely, 2^320043001 is an apocalyptic number.

It is an amenable number.

320043001 is a deficient number, since it is larger than the sum of its proper divisors (75371).

320043001 is an equidigital number, since it uses as much as digits as its factorization.

320043001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75370.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 320043001 is about 17889.7456941120. The cubic root of 320043001 is about 684.0210150800.

Adding to 320043001 its reverse (100340023), we get a palindrome (420383024).

The spelling of 320043001 in words is "three hundred twenty million, forty-three thousand, one".