306073 has 4 divisors (see below), whose sum is σ = 307300. Its totient is φ = 304848.

The previous prime is 306049. The next prime is 306083. The reversal of 306073 is 370603.

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 can be written as a sum of positive squares in 2 ways, for example, as 242064 + 64009 = 492^2 + 253^2 .

It is a cyclic number.

It is not a de Polignac number, because 306073 - 2⁵ = 306041 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 306073.

It is not an unprimeable number, because it can be changed into a prime (306023) 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, 90 + ... + 787.

It is an arithmetic number, because the mean of its divisors is an integer number (76825).

2³⁰⁶⁰⁷³ is an apocalyptic number.

It is an amenable number.

306073 is a deficient number, since it is larger than the sum of its proper divisors (1227).

306073 is an equidigital number, since it uses as much as digits as its factorization.

306073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 306073 is about 553.2386465170. The cubic root of 306073 is about 67.3919992147.

Adding to 306073 its reverse (370603), we get a palindrome (676676).

The spelling of 306073 in words is "three hundred six thousand, seventy-three".