320005073 has 4 divisors (see below), whose sum is σ = 320251968. Its totient is φ = 319758180.

The previous prime is 320005069. The next prime is 320005109. The reversal of 320005073 is 370500023.

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 320005073 - 2² = 320005069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320005013) 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, 121493 + ... + 124098.

It is an arithmetic number, because the mean of its divisors is an integer number (80062992).

Almost surely, 2^320005073 is an apocalyptic number.

It is an amenable number.

320005073 is a deficient number, since it is larger than the sum of its proper divisors (246895).

320005073 is a wasteful number, since it uses less digits than its factorization.

320005073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246894.

The product of its (nonzero) digits is 630, while the sum is 20.

The square root of 320005073 is about 17888.6856140970. The cubic root of 320005073 is about 683.9939931132.

Adding to 320005073 its reverse (370500023), we get a palindrome (690505096).

It can be divided in two parts, 32000 and 5073, that added together give a palindrome (37073).

The spelling of 320005073 in words is "three hundred twenty million, five thousand, seventy-three".