306402513073 has 4 divisors (see below), whose sum is σ = 306442895220. Its totient is φ = 306362130928.

The previous prime is 306402513041. The next prime is 306402513091. The reversal of 306402513073 is 370315204603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 370315204603 = 140527 ⋅2635189.

It can be written as a sum of positive squares in 2 ways, for example, as 8322547984 + 298079965089 = 91228^2 + 545967^2 .

It is a cyclic number.

It is not a de Polignac number, because 306402513073 - 2⁵ = 306402513041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (306402513973) 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, 20179690 + ... + 20194867.

It is an arithmetic number, because the mean of its divisors is an integer number (76610723805).

Almost surely, 2^306402513073 is an apocalyptic number.

It is an amenable number.

306402513073 is a deficient number, since it is larger than the sum of its proper divisors (40382147).

306402513073 is an equidigital number, since it uses as much as digits as its factorization.

306402513073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40382146.

The product of its (nonzero) digits is 45360, while the sum is 34.

Adding to 306402513073 its reverse (370315204603), we get a palindrome (676717717676).

The spelling of 306402513073 in words is "three hundred six billion, four hundred two million, five hundred thirteen thousand, seventy-three".